No bitprints doesn't mean the file doesn't exist, just means nobody's rated it yet on Bitzi.

You have to search in different ways for some files. Vary your search terms a bit (try looking for actors' names or even director's name) & use the All Types search as well as Video. Search for title - avi (or whatever format you want). Search at different times of day when hosts in other time zones are online.

What's available on the network is constantly changing as people log on & off, add or delete files etc. Keep searching
LimeWire is just a Gnutella client... it can't ban videos. AFAIK, eDonkey uses the Overnet network... so you'll find different results than on Gnutella!
*Please just post once, multiple posts are a pain.