I had the same problem going through the Gringott's line when I was there. The line moved too fast to get good shots. I was able to convince my husband to go a second time, but he got frustrated with me constantly stopping. Then most of the stuff was too far away or at weird angles to get decent, usable shots. Plus it is pretty dark. I thought I had a couple of ledger shots, but you can't read anything on them. It is really cool to walk through, but nearly impossible to get reference shots.
Fantastic pics and videos, though. Thanks so much for sharing them!