Hi guys, noob here!

I'm playing back a video via the HTMLVideoElement in a Safari browser (latest), and I'm seeing some weird frame bleeding.

My question is - what is the issue seen in the attached video (and screenshot) technically called? Scrambled video? Frame bleeding? It's difficult to find a solution when I'm not sure what keywords to search for.
Image
[Attachment 68226 - Click to enlarge]

https://youtu.be/L5KMzvWH0jo