This is a demonstration of secure HLS end to end encryption. FV Player Pro is able to decrypt them and only play them to Your users. These videos can't be hotlinked, or downloaded and played offline. This adds another layer of security to Your videos.
Coconut.co is a great service which is easy to use with FV Player Coconut addon which is available for free.
If you need full control over your HLS encoding process, then AWS MediaConvert offers a lot more options that Coconut.co. You can check our guide here: AWS MediaConvert Encrypted HLS Guide
AWS Elastic Transcoder
You can learn how to create and encrypted HLS with Amazon Elastic Transcoder in this guide - How to setup encrypted HLS stream with Amazon Elastic Transcoder