on a side note recording a video of your "desktop" on android is very easy using game screen recorder, it's what i use https://play.google.com/store/apps/details?id=com.drivergenius.screenrecorder
just set it up to record desktop without using your microphone and afterwards upload to youtube or something else.
There's an app I use called "Movie Mate", it's basically the same thing for movies: https://play.google.com/store/apps/details?id=com.moviematelite
My search for a good book cataloging app is actually how I came across MGC. I'll freely admit I've been too lazy to actually start the book cataloging process (I really just wanted something I could scan books in the library to simply create a look-at-these list but that was just too much for most apps), but by far the best app I've found is Book Catalogue. There are so many out there and I've found glaring flaws with all of them (the other apps).
I can't imagine it would be any faster, but I suppose if you could somehow rapidly photograph all the ISBNs or UPCs and then use OCR on the images it would create something you could work with.