I'm kind of new on Adobe Premiere but I can understand easily.
Also, I'm on the new Macbook Air M1.
Here is my issue:
I'm making a long mix video ( > 1h) for music promotion and I use clip I found on Youtube (I RIP it from Youtube). All the clip I have are in .mp4.
The problem is that some clips have random glitches after importing them to Adobe Premiere. Yes I clean cache, yes I update everything, yes I tried every render (metal, open, software), but still, the issue stays.
You say these are 'random glitches'. Random in that they occur anywhere in the clip *but* always appear on the *same* frame when playing in Premiere Pro OR when you play the clip in Premiere Pro the glitches pop up at different spots each time you play the clip in Premiere Pro?
If the glitches are in the same place everytime then maybe the glitches were introduced when the clips where downloaded?
One way to see if this is the case is playback the downloaded YouTube clips in QuickTime player and see if the glitches are visible there.