"No external sites" is a flagrant, blatant lie. All this does is redirect you to an external site. Complete rubbish.

One star only because otherwise I can't comment.

Two things...

1st - The service isn't "permanently" available.

2nd - The download button doesn't appear in the Shorts, only in the videos. (Possibly, I don't know, I'm guessing it's because the service isn't working.)