If i recall correctly, there is a record button in the Scratch editor. Under file (or one of the dropdowns), click record to record what is on the stage. I think there is also a 1 minute recording limit.
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My 500th post: https://scratch.mit.edu/discuss/topic/189237/
My 1000th post: https://scratch.mit.edu/discuss/topic/216809/
My 1500th post: https://scratch.mit.edu/discuss/topic/234381/?page=1#post-2388018
YmFja3VwLXNpZ2d5LWlk Google this to see some of my posts.