How to download material from yt or twitch?
Define → material
Videos or twitch clips simply material
Here is a Youtube-Downloader: https://www.4kdownload.com/de/products/product-videodownloader Available for Windows, Mac and Linux.
After the installation and the first start click on Intelligent mode. Put the tick on Enable Smart Mode, then choose the desired format (e.g., MP3, MP4, etc.) and, for quality, e.g. Original. Select a folder in the destination directory where the videos are to be saved.
This is the free version. It can download a maximum of 12 Youtube videos at a time. Otherwise no restrictions.