Everything was going great and then BAAAM no more videos! While it could be anything odds are it’s one of two actual issues. The first is you need to ask yourself “did I install any kind of new video player or codecs recently?”. If the answer is yes then I would start looking there first. For me it wasn’t the first but the second issue. A quick fix for me and I’m hoping for you as well is to simply pull up a video that’s playing nothing but a green background, right click on the video, go to settings and uncheck the Hardware Acceleration box. Reload or restart your browser and see if it’s fixed!
If not, sorry I tried!