Is there a good example someone can show of naturally generating real videos using extending and interpolation from the last frames? (For any of the video gener

Is there a good example someone can show of naturally generating real videos using extending and interpolation from the last frames? (For any of the video generators). I mean I have not tinkered that much, but trying to even get a video to 30 seconds (I just want a cartoon AI avatar to narrate tutorials) has been incredibly difficult. They drift so easily. Many AI videos you can tell just stitch short clips together. I just want a continuous scene for like 30 seconds to 2 minutes.