I have managed by clicking on the individual video to get the menu to add images screenshot to the video. My playlist is now completed, tks for you help.
https://aeromarine.nl/2020/06/06/asmara-videos/

### Begin System Info ###

## Please include this information when posting support requests ##

Multisite:                No

SITE_URL:                 https://aeromarine.nl
HOME_URL:                 https://aeromarine.nl
Plugin URL:               https://aeromarine.nl/wp-content/plugins/fv-wordpress-flowplayer

FV Player version:        7.4.24.727
FV Player core version:   7.2.7
FV Player license:        

WordPress Version:        5.4.2
Permalink Structure:      /%year%/%monthnum%/%day%/%postname%/
Active Theme:             ColorMag 1.4.9

Browser:                  Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.97 Safari/537.36
PHP Version:              7.2.29
MySQL Version:            5.5.61
Web Server Info:          Apache

WordPress Memory Limit:   40M
PHP Memory Limit:         1024M
PHP Upload Max Size:      50M
PHP Post Max Size:        50M
PHP Upload Max Filesize:  50M
PHP Time Limit:           600
PHP Max Input Vars:       5000
PHP Arg Separator:        &
PHP Allow URL File Open:  Yes
WP_DEBUG:                 Disabled

DISPLAY ERRORS:           N/A
cURL:                     Your server supports cURL.

ACTIVE PLUGINS:

Add From Server: 3.3.3
Akismet Anti-Spam: 4.1.6
BackUpWordPress: 3.10
Classic Editor: 1.5
Duplicate Post: 3.2.4
Embed Plus for YouTube - Gallery, Channel, Playlist, Live Stream: 13.4
Embed Video Thumbnail: 2.0.3
FG Joomla to WordPress: 3.66.2
Flamingo: 2.1.1
FV Player: 7.4.24.727
Google Analytics for WordPress: 1.1
Gutenberg PDF Viewer Block: 0.1
Gwolle Guestbook: 4.0.2
Insert Headers and Footers: 1.4.5
Ninja Forms: 3.4.24.3
Page Builder: Live Composer: 1.5.6
PHP Compatibility Checker: 1.5.0
Really Simple SSL: 3.3.4
Regenerate Thumbnails Advanced: 2.3.0
Smart Slider 3: 3.4.1.8
Smush: 3.6.3
ThemeGrill Demo Importer: 1.6.4
Under Construction: 3.75
WordPress Importer: 0.7
WordPress Related Posts Thumbnails: 1.8.3
WPForms Lite: 1.6.0.2
WP Google Maps: 8.0.25
Yoast SEO: 14.3

SETTINGS

Array
(
    [nag_fv_player_7] => 1
    [notice_new_lightbox] => 1
    [notice_db] => 1
    [notice_xml_sitemap_iframes] => 1
    [autoplay] => false
    [googleanalytics] => 
    [chromecast] => true
    [key] => 
    [logo] => 
    [rtmp] => 
    [auto_buffering] => true
    [disableembedding] => false
    [disablesharing] => false
    [disable_video_hash_links] => true
    [popupbox] => false
    [allowfullscreen] => true
    [allowuploads] => true
    [postthumbnail] => false
    [tgt] => backgroundcolor
    [backgroundColor] => #333333
    [canvas] => #000000
    [sliderColor] => #ffffff
    [durationColor] => #eeeeee
    [timeColor] => #eeeeee
    [progressColor] => #bb0000
    [bufferColor] => #eeeeee
    [timelineColor] => #666666
    [borderColor] => #666666
    [hasBorder] => false
    [adTextColor] => #888888
    [adLinksColor] => #ff3333
    [subtitleBgColor] => rgba(0,0,0,0.50)
    [subtitleSize] => 16
    [playlistBgColor] => #808080
    [playlistFontColor] => #
    [playlistSelectedColor] => #bb0000
    [logoPosition] => bottom-left
    [parse_commas] => false
    [width] => 640
    [height] => 360
    [engine] => false
    [font-face] => Tahoma, Geneva, sans-serif
    [ad] => 
    [ad_width] => 0
    [ad_height] => 0
    [ad_css] => .wpfp_custom_ad { position: absolute; bottom: 10%; z-index: 20; width: 100%; }
.wpfp_custom_ad_content { background: white; margin: 0 auto; position: relative }
    [ad_show_after] => 0
    [disable_videochecker] => false
    [interface] => Array
        (
            [ads] => false
            [align] => false
            [autoplay] => false
            [controlbar] => true
            [embed] => true
            [mobile] => true
            [playlist_advance] => true
            [playlist] => true
            [playlist_captions] => true
            [share] => true
            [speed] => false
            [splash_text] => true
            [subtitles] => false
            [sticky] => true
            [synopsis] => true
            [end_actions] => true
            [lightbox] => true
            [popup] => true
        )

    [amazon_bucket] => Array
        (
            [0] => 
        )

    [amazon_key] => (redacted, 1)
    [amazon_secret] => (redacted, 1)
    [amazon_region] => Array
        (
            [0] => eu-west-3
        )

    [amazon_expire] => 5
    [amazon_expire_force] => false
    [fixed_size] => false
    [js-everywhere] => true
    [marginBottom] => 28
    [ui_play_button] => true
    [volume] => 0.7
    [player-position] => 
    [playlist_advance] => true
    [sharing_email_text] => Check out the amazing video here
    [liststyle] => horizontal
    [ui_speed_increment] => 0.25
    [popups_default] => no
    [email_lists] => Array
        (
            [#fv_list_dummy_key#] => Array
                (
                    [title] => 
                    [description] => 
                    [first_name] => 0
                    [last_name] => 0
                    [disabled] => 0
                )

            [0] => Array
                (
                    [title] => 
                    [description] => 
                    [first_name] => 0
                    [last_name] => 0
                    [disabled] => 0
                )

            [1] => Array
                (
                    [title] => Subscribe to list one
                    [description] => Two good reasons to subscribe right now
                    [first_name] => 1
                    [last_name] => 1
                    [disabled] => 0
                )

        )

    [sticky_video] => true
    [sticky_place] => right-bottom
    [sticky_width] => 380
    [playlist-design] => 2017 visible-captions
    [skin-slim] => Array
        (
            [progressColor] => #bb0000
        )

    [skin-youtuby] => Array
        (
            [progressColor] => #bb0000
        )

    [skin-custom] => Array
        (
            [hasBorder] => false
            [bottom-fs] => false
            [borderColor] => #666666
            [marginBottom] => 
            [bufferColor] => #eeeeee
            [canvas] => #000000
            [backgroundColor] => rgba(51,51,51,1.00)
            [font-face] => Tahoma, Geneva, sans-serif
            [player-position] => 
            [progressColor] => #51ba00
            [timeColor] => #eeeeee
            [durationColor] => #eeeeee
            [design-timeline] =>  
            [design-icons] =>  
        )

    [skin] => custom
    [hlsjs] => true
    [lightbox_images] => true
    [lightbox_improve_galleries] => true
    [mailchimp_api] => 
    [mailchimp_list] => 
    [mailchimp_label] => Subscribe for updates
    [version] => 7.4.24.727
    [css_writeout-https-aeromarine-nl] => 1592401805
    [video_checker_agreement] => true
    [video_model_db_checked] => 7.4.24.727
    [video_meta_model_db_checked] => 7.4.24.727
    [player_model_db_checked] => 7.4.24.727
    [player_meta_model_db_checked] => 7.4.24.727
    [pro] => Array
        (
        )

    [show_controlbar] => true
    [hd_streaming] => false
    [multiple_playback] => false
    [ui_no_picture_button] => false
    [ui_repeat_button] => false
    [ui_rewind_button] => true
    [ui_speed] => false
    [splash] => 
    [subtitleOn] => false
    [video_position_save_enable] => true
    [integrations] => Array
        (
            [featured_img] => true
            [wp_core_video] => true
            [facebook_sharing] => false
            [schema_org] => true
        )

    [css_disable] => false
    [profile_videos_enable_bio] => false
    [parse_comments] => false
    [rtmp-live-buffer] => false
    [db_duration] => false
    [lightbox_force] => false
    [mobile_native_fullscreen] => true
    [mobile_force_fullscreen] => true
    [mobile_alternative_fullscreen] => false
    [mobile_landscape_fullscreen] => false
    [video_sitemap] => true
    [video_sitemap_meta] => 
    [fv-wp-flowplayer-submit] => SaveAllChanges
    [playlistFontColor-proxy] => #
    [subtitleFontFace] => inherit
    [s3_browser] => false
    [vi_login] => 
    [vi_pass] => 
)

DATABASE

CREATE TABLE `wptdz_fv_player_players` (
  `id` bigint(20) unsigned NOT NULL AUTO_INCREMENT,
  `player_name` varchar(255) COLLATE utf8mb4_unicode_ci NOT NULL,
  `player_slug` varchar(255) COLLATE utf8mb4_unicode_ci NOT NULL,
  `videos` text COLLATE utf8mb4_unicode_ci NOT NULL,
  `ab` varchar(3) COLLATE utf8mb4_unicode_ci NOT NULL,
  `ad` text COLLATE utf8mb4_unicode_ci NOT NULL,
  `ad_height` varchar(7) COLLATE utf8mb4_unicode_ci NOT NULL,
  `ad_width` varchar(7) COLLATE utf8mb4_unicode_ci NOT NULL,
  `ad_skip` varchar(7) COLLATE utf8mb4_unicode_ci NOT NULL,
  `align` varchar(7) COLLATE utf8mb4_unicode_ci NOT NULL,
  `author` bigint(20) unsigned NOT NULL DEFAULT '0',
  `autoplay` varchar(7) COLLATE utf8mb4_unicode_ci NOT NULL,
  `controlbar` varchar(7) COLLATE utf8mb4_unicode_ci NOT NULL,
  `copy_text` varchar(120) COLLATE utf8mb4_unicode_ci NOT NULL,
  `changed_by` bigint(20) unsigned NOT NULL DEFAULT '0',
  `date_created` datetime NOT NULL DEFAULT '0000-00-00 00:00:00',
  `date_modified` datetime NOT NULL DEFAULT '0000-00-00 00:00:00',
  `embed` varchar(12) COLLATE utf8mb4_unicode_ci NOT NULL,
  `end_actions` varchar(10) COLLATE utf8mb4_unicode_ci NOT NULL,
  `end_action_value` varchar(255) COLLATE utf8mb4_unicode_ci NOT NULL,
  `height` varchar(7) COLLATE utf8mb4_unicode_ci NOT NULL,
  `hflip` varchar(7) COLLATE utf8mb4_unicode_ci NOT NULL,
  `lightbox` varchar(7) COLLATE utf8mb4_unicode_ci NOT NULL,
  `lightbox_caption` varchar(120) COLLATE utf8mb4_unicode_ci NOT NULL,
  `lightbox_height` varchar(7) COLLATE utf8mb4_unicode_ci NOT NULL,
  `lightbox_width` varchar(7) COLLATE utf8mb4_unicode_ci NOT NULL,
  `playlist` varchar(10) COLLATE utf8mb4_unicode_ci NOT NULL,
  `playlist_advance` varchar(7) COLLATE utf8mb4_unicode_ci NOT NULL,
  `qsel` varchar(25) COLLATE utf8mb4_unicode_ci NOT NULL,
  `share` varchar(7) COLLATE utf8mb4_unicode_ci NOT NULL,
  `share_title` varchar(120) COLLATE utf8mb4_unicode_ci NOT NULL,
  `share_url` varchar(255) COLLATE utf8mb4_unicode_ci NOT NULL,
  `speed` varchar(255) COLLATE utf8mb4_unicode_ci NOT NULL,
  `sticky` varchar(7) COLLATE utf8mb4_unicode_ci NOT NULL,
  `video_ads` varchar(10) COLLATE utf8mb4_unicode_ci NOT NULL,
  `video_ads_post` varchar(10) COLLATE utf8mb4_unicode_ci NOT NULL,
  `width` varchar(7) COLLATE utf8mb4_unicode_ci NOT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=5 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci

CREATE TABLE `wptdz_fv_player_playermeta` (
  `id` bigint(20) unsigned NOT NULL AUTO_INCREMENT,
  `id_player` bigint(20) unsigned NOT NULL DEFAULT '0',
  `meta_key` varchar(255) COLLATE utf8mb4_unicode_ci NOT NULL,
  `meta_value` longtext COLLATE utf8mb4_unicode_ci NOT NULL,
  PRIMARY KEY (`id`),
  KEY `id_player` (`id_player`),
  KEY `meta_key` (`meta_key`(191))
) ENGINE=InnoDB AUTO_INCREMENT=39 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci

CREATE TABLE `wptdz_fv_player_videos` (
  `id` bigint(20) unsigned NOT NULL AUTO_INCREMENT,
  `src` varchar(1024) COLLATE utf8mb4_unicode_ci NOT NULL,
  `src1` varchar(1024) COLLATE utf8mb4_unicode_ci NOT NULL,
  `src2` varchar(1024) COLLATE utf8mb4_unicode_ci NOT NULL,
  `splash` varchar(1024) COLLATE utf8mb4_unicode_ci NOT NULL,
  `splash_text` varchar(1024) COLLATE utf8mb4_unicode_ci NOT NULL,
  `caption` varchar(1024) COLLATE utf8mb4_unicode_ci NOT NULL,
  `end` varchar(1024) COLLATE utf8mb4_unicode_ci NOT NULL,
  `mobile` varchar(1024) COLLATE utf8mb4_unicode_ci NOT NULL,
  `rtmp` varchar(1024) COLLATE utf8mb4_unicode_ci NOT NULL,
  `rtmp_path` varchar(1024) COLLATE utf8mb4_unicode_ci NOT NULL,
  `start` varchar(1024) COLLATE utf8mb4_unicode_ci NOT NULL,
  PRIMARY KEY (`id`),
  KEY `src` (`src`(191)),
  KEY `caption` (`caption`(191))
) ENGINE=InnoDB AUTO_INCREMENT=28 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci

CREATE TABLE `wptdz_fv_player_videometa` (
  `id` bigint(20) unsigned NOT NULL AUTO_INCREMENT,
  `id_video` bigint(20) unsigned NOT NULL DEFAULT '0',
  `meta_key` varchar(255) COLLATE utf8mb4_unicode_ci NOT NULL,
  `meta_value` longtext COLLATE utf8mb4_unicode_ci NOT NULL,
  PRIMARY KEY (`id`),
  KEY `id_video` (`id_video`),
  KEY `meta_key` (`meta_key`(191))
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci

### End System Info ###

https://aeromarine.nl/2020/06/06/asmara-videos/#