Good - for YouTube I depend on BYTubeD (development stopped) Rated 3 out of 5 stars
Regretfully however, it is not able to download Youtube videos under user-account-videomanagement (like 'watch later', etc).
For this I use BYTubeD as a workaround.
BYTubed is not being developed anymore but still works nicely.
It generates hyperlinks in a separate browsertab for all or selected videos.
Then I start DTA to download those videos based, based on these hyperlinks.
It would be nice if this was implemented in DTA.
For Youtube videomanagement DTA+BYTubed is a splendid combo.