1. Best of Both Worlds Presents  VHS - Concert   Official Video     
2. Music Canada  TV Broadcast - Concert at CBC Canadian TV '67
3. Chrysler Festival  TV Broadcast - Concert at CBC Canadian TV

There should be some more but they are very difficult to find, since they are very old!
 
This great Percy Faith site has two WMV video files of Percy Faith conducting his orchestra: Mucho Gusto and The Song from Moulin Rouge. It looks great.

Also, there is a clip circulating in peer-to-peer circles of Percy Faith conducting his orchestra of his most famous arrangement: Theme from a Summer Place.