I import a video to edit from Youtube, and I play it in the Sequence Preview section but the video freezes after about 3 seconds while the audio continues. It also freezes in the Clip Preview section. I try to edit the video and it stays frozen. I reverse the footage and that works in relation to creating a video that doesn't freeze. But when when I import the reversed video and then reverse it again, it goes back to being frozen after a few seconds.
It seems to happen mainly to lower quality videos and also shorter videos (no longer than 90 secs), but this is not an issue I have experienced in the past and I have been using this product for many years. I did recently pay for the upgrade which I am now regretting as I had never experienced this before with my "old" version.