I downloaded the 0.5 version of the app. to test it and here are the results. Now I'm most interested in downloading music videos so my tests are a bit biased.
I ran the following tests on a laptop running CentOS Stream 9.
From YouTube.
1. download single video 2. download a queue of videos, 9 videos 3. download a short playlist, 4 videos
All worked as expected.
I then downloaded a video from Rumble and that also worked.
