Tau01

Yes, I am sure this issue is related to Global Speed. The recorded video that Global Speed is fully disabled has been uploaded to bilibili for comparison. The issue doesn't...

That is true. After changing (edge://flags/#use-angle) to D3D9, the issue temporarily disappeares.  

I tried your packed, but it doesn't work normally on the bilibili video. Nothing happened after I adjusted the speed or used the keyboard to seek as uasual. Emm, only...

For the previous two points, I have disabled the old version and then refreshed. Next, I enabled the new one, then I refreshed the page again. It just doesn't work....

Well, I test it for a little long time on each fomat, AV1, HEVC and AVC. The result is that the issue isn't solved by this packed version. Besides, this...