Quicktimeplayer error while recording(only some parts have screen)

When doing screen time in quicktimeplayer only 2 minutes is screen recorded and the rest has only audio. Please help. It might be because it is 1 hour long. You can answer this in this post or my youtube channel. Please respond quick it took a long time.

https://www.youtube.com/channel/UC3d0CUBZyns8vF9DhS7T0Tg?view_as=subscriber