Situation with loading and watching my older videos: "The media could not be loaded, either because the server or network failed or because the format is not supported."

I've been recently having this situation with my older videos of this year, not too sure what to do to fix the problem, any ideas? I posted it on my channel on Dtube, uploaded it from my computer in Mp4 format similar to Youtube uploading standards. For instance my video "Overwatch Hijinks - 2" is having this problem. The video loads with an infinite buffering loop then stops with an "X" in the center of the screen followed by a red play button in the lower left corner that does nothing. I'll link the video below.