こねこ - 複数の動画を一つに繋げるアプリ

You can combine shredded videos into one.
It takes a long time to process, so please use it when you have time.

There is a function to download videos in HLS format experimentally.
It does not support live broadcasting (only when the playlist file is fixed)

This app is open source
https://github.com/takusan23/Coneco