You can search using multiple filters. For example this is N2 + N4. You can then filter by specific mastery (even by individual vectors). As far as I know this is the only way to change mastery in bulk for a given vector(s) (from "Actions").
You can do other things too. What exactly do you want to know?
Maybe you wanna make a new list that contains only the verbs you've studied?
Maybe change the mastery of all Katakana terms you've studied?
Thx I watched the video.. What if I want to create a schedule that only has N5 verbs taught or maybe like making a schedule separating Godan and ichidan verbs?
The first one is easy. You can also add "Studied before" if you want only the ones you've studied:
Not sure you can separate them based on Godan/Ichidan though. I'd have to look into that one.
Update: I don't see a way of filtering by Godan/Ichidan. The search function doesn't seem to recognise those either. I could be missing something of course.