Improve the UI/UX on the stored videos (video configurations) page

[ArturoManzoli]

Since a big part of our current users are dedicated to video/image capturing, a face-lift on the 'recorded videos' page would be quite important.
The idea is to add a video manager section on the menu (and maybe in a widget) and leave the 'configuration menu/video' only for config purposes.

[ES-Alexander]

For some context, I don't think there's been a lot of thought put into that UI/UX yet (I'm pretty sure @rafaellehmkuhl just made a thing that works, so the functionality was at least usable, with the intent to polish it later).

If a concerted effort is being put into that UI design / UX then I'd recommend it be done with #772 in mind (either as part of the design, or as a planned future expansion), and ideally also #619 more generally.