Hi Juraj,
Thanks for help. We can close this because issue of this ticket was solved.
I created new ticket: https://foliovision.com/support/fv-wordpress-flowplayer/troubleshooting/video-playback-issue

With detailed explanations.

Thanks Juraj!

Now I find where I need to take Private key.
I found this article: https://foliovision.com/player/video-hosting/serving-private-cloudfront

Before I use Secret access key from credentials.

I did everything, but I have issues with video.
I sent report to see how to fix this.
Thanks!