I had high expectations for this app but I'm disappointed.
The app is good overall and very "Mac" app which is a good point but the main use case of the app (adding a new video) is not very well thougth.
First despite it's name, it doesn't connect to YT's cette application Later so even if you have already a list of videos to cette application later, you have to add them manually.
And the most important point, adding a video isn't very ergonomic ; no way to add a whole YT playlist, no drag and drop in the main window (works in the add modal view) and no Safari extension to do it in 1 click from the browser, so adding a video requires several step, (launch the app, click the add button and drag or copy the videao link).
For an app that advertise itself as the best way to save videos, it's very disappointing.