I believe it. I was just using AI to help out with some mandatory end of year writing exercises at work.

Eventually, it starts to muck with the earlier work that it did good on, when I'm just asking it to add onto it.

I was still happy with what I got in the end, but it took trial and error and then a lot of piecemeal coaxing with verification that it didn't do more than I asked along the way.

I can imagine the same for video or images. You have to examine each step post prompt to verify it didn't go back and muck with the already good parts.