That’s a great and fast one for MP3 files which are audio only but for audio and video you will need a converter to MP4 files. I just found this one that works well and fast without any personal info.
https://mp4s.org/en1/youtube-to-mp4/
If you really want to have some fun and learn a new skill with video editing; Shotcut is a free and fast opensource editing program that is quite robust. It even works on slower computers which most video editing programs do not.
https://www.shotcut.org/download/
Just record the audio (from any source) via Audacity, and save as an MP3 file. Cant get much easier.
Thanks, I bkmd both of these for future reference.