Suddenly seeing "There was an error playing the video" on all videos and records

[MlleBaeten]

We display this component directly on the File/ContentDocument record page if the filetype is mp4, but I just noticed that it's showing the error message and never showing the video. I checked the other application of this component (on Chatter Groups), and I'm seeing the error message there at all.

No change to my browser, browser settings, file settings, etc. since it last worked.