I've only had the app installed for a day, but so far all is great. It stops auto-play!
I've seen the comments about a whitelist and agree that would be a good addition; however, at this time, I don't have any videos that I want to auto-play, so I'm "meh" on a whitelist.
I also want to say that I don't mind the red box around the video. It helps me to "see" that the video has been stopped.
Great job. Thanks much.