I used this addon from beginning on to download thousands of videos. Until v10 update made is useless.
Update from v9.5 to v10 broke/removed nearly everything I liked about this BEST add-on ever:
- legacy mode removed
- no more posssible to preselect download location BEFORE dowloading and then just let it download, like it was last possible in v9.5
- videos too often not recognized

I have rolled back to the the last update before this and have disabled updates (rollback was sadly only possible on firefox, but not on chrome/edge). And with v9.5 videos continue being recognized, download location can be preseselected BEFORE download, interface is again clean in legacy mode.
I think that developer is not using it himslef and can not recognize how critical it is to select location and name of file BEFORE !!!! starting to download. If you let download like 10 videos parallelly , it is mission critical that you can do it.
It is WRONG if you have downloded video into memory and only then the extension asks you where to save it. I want to program download job and leave PC alone to finish it. and not return back and try to remember what I wanted to save where.
I will never understand why developer decided to make a PERFECT addon worse by removing core functions.