1. Where can I see individual videos today?
Almost everything is on YouTube.
2. What about bootlegs?
A very taboo subject around the official website, many boots are in fact out there. A few videos:
-Journey on PBS's Soundstage in 1977
-A 1980 concert in Tokyo
-The 1981 Houston concert has recently been released, making the bootleg useless
-1981 in Japan
-1984 at the Budokan Theatre
-1986 at Mountain Aire in California
-All sorts of shows featuring the current lineup
Audio bootlegs are more numerous. However, be wary - both Journey and Steve Perry have expressed their dislike of bootleg sharing and promotion, so the subject is off limits at many forums. You can, however, see some of these clips at YouTube.