Quality was fine watching it here. Youtube sometimes takes some time to prepare the high quality streams.
When it comes to the issue. I can clearly see that the Line is already at its max and pulseaudio(the sound server) somehow takes into account Line + Lineboost when showing you the volume slider for recording.
So putting the slider up will activate the line booster and thats why you get distortion.
So if you keep stuff at 20% it should not distort
I think the main issue now is solved.
If you think so too just edit your initial postings title and add [solved] to it
When it comes to the issue. I can clearly see that the Line is already at its max and pulseaudio(the sound server) somehow takes into account Line + Lineboost when showing you the volume slider for recording.
So putting the slider up will activate the line booster and thats why you get distortion.
So if you keep stuff at 20% it should not distort
I think the main issue now is solved.
If you think so too just edit your initial postings title and add [solved] to it