The post link that the problems appears in is here
https://techcommunity.microsoft.com/t5/Discussions/Video-Playback-Glitching/m-p/919936
I'm using Microsoft Edge insider Version 79.0.308.0 (Official build) canary (64-bit)
at first I thought it's just probably a browser cache file so I tried it on inPrivate mode but still the problem exists.
the attachment is going out of the designated post frame
