I've been using this downloader for years, if it doesn't work try again later.

Because every once in a while the pests at google/youtube change things and break its functionality, but the developer makes it work again within a few days.
It works well and downloads almost everything on youtube, including age locked.
I've never used the "PRO UPGRADE" So I can't comment on that.

I've used other downloaders in the past, but they weren't maintained and quickly stopped working.
The constant effort and work of Dishita to keep this addon functional is what makes it so special.

Thank you very much for making and maintaining it!