Ask HN: Anyone interested in a tool like this?

So I got the idea to make a desktop app or command line app that allows you to merge multiple YouTube videos into a single long one with ytdl + ffmpeg.

I can think of two use cases where this could be useful.

1) You want to put something on your TV. You would use my tool to create a long stream of curated YouTube videos and then you would put it on your TV to playback. Like making your own TV program.

2) If you're a parent and want absolute control on what your children are exposed to on YouTube. You create a single long video which contains the videos they want to watch and nothing else and then you give it to them.

Are any of these use cases realistic? Any parents who would find this useful.

I personally don't need something like this but the idea just came to me. It might be worth building.