I have cleared the cache, factory reset the phone... I have used multiple browsers (Samsung Internet, Google, Duck Duck Go) all downloaded from the play store. When I am in a call on WhatsApp I simply cannot watch any videos. After hanging up everything works as normal. I'm guessing there is a glitch in the call permissions stopping all video playback. When trying to start a video during a call, the video will load, I click play, the video jumps 1 frame. if I do this consecutively there is a split second of audio too. Always stopping never playing the video. WhatsApp is surely the culprit.