Try cobalt.tools. It does what you want to do inside a browser tab (although I only used it on desktop so far), but it might work with an IPhone as well. You can convert YouTube links into either mp3, ogg, wave and opus files (with various bitrates), or mp4 or webm video files (with various resulutions). I use it constantly.

This can of pineapple slices has been found in the back of the food cabinet in December 2020. Its expiration date was in July 2017. I did not open it. I carefully removed the can outside right into the trash bin. I didi’t want to risk an explosion of this fruit bomb.

When changing lanes or turning you are supposed to use the turning signal before doing the manouver. The turning signal is supposed to warn other drivers that you are going to do something. It doesn’t make any sense to use the turning signal when already mid-turning or while already changing lanes. Many drivers don’t seem to know that.