I may be stupid, but I have an idea.
How about an MP4 record button in the snap editor like scratch/turbowarp

The record button only appears in the snap editor.
Scratch’s record button doesn’t record variables, lists or ask prompts
The record button works the same, but with a twist, it can also record variables, lists or ask prompts
The reference Image before recording and clicked this button:
The purpose I created this topic is that recording your snap animations is a bit complicated because you have to use external(like a camera) or pre-installed screen recorders
