There have been policy changes in particular browsers that restrict auto-playing videos altogether. Unfortunately, this is not something that POWR apps can override if the policies are active in your browsers. Also, it isn't possible to hide the video title and playback controls for YouTube videos anymore because YouTube has unfortunately removed the ability from their API. For now, this is only possible for Vimeo videos.
Check out the following article detailing the changes to the Autoplay Policy in Google Chrome: https://developers.google.com/web/updates/2017/09/autoplay-policy-changes