Now...this all depends on what you call a good music video...
Do you want something that's an actual music video with all the editing done and what not or does concerts recorded live count?
Meh I'll provide a little bit of both to bands that are just kinda out of there...
A live recording Pyschobilly
Communication Breakdown (Live) by Mad Sin Another Pyschobilly band.
Rot in Hell by NekromantixA ska music video...so genre is 3rd Wave Ska
Over the Edge by Mustard PlugA more metal/ Shock metal genre band's music video.
Immortal Corrupter by GWARMainsteam 'Punk'
This is the End (For you My Friend) by Anti-FlagAnother punk band...
Just like Clock Work by Lower Class BratsOlder Punk/ Pop Punk...you might recognize this song...actually if you don't I should slap you...
Rock the Casbah by The ClashA Rock band which Joe Strummer was a part of in his later years. (Joe Strummer was the main guy of The Clash for those that don't know.)
Johnny Appleseed by Joe Strummer and The MescalerosAnother Rock one...
Nobody's Hero by RushA Two-Tone Ska band...their music videos are just funny...so is a lot of their music actually.
Baggy Trousers by MadnessA Spanish 3rd Wave ska band
Welcome to Hell by Ska-PA Rock/Rap group. (One of Tim Armstrong's many groups. Tim is mainly known from the band Rancid.)
DJ DJ by The TransplantsAn interesting band...on their myspace it lists them as "Punk / Electro / Ghettotech" They also aren't really a big band at all. In fact they are more of a garage band. My brother's band has played with them several times at that. And the link is a live performance on a live public access TV thing which I think is actually a kid's show...not sure...but they only play for the first 2 1/2 minutes about...figure i'd add them because they are quite interesting...
Dead Living by Parsley FlakesAnyways...I figured i'd provide a good list of videos of bands that aren't really heard of that much. Well...besides GWAR, The Clash, and Rush most of these bands aren't heard of too much.
Also hope that this might help you in some way. If I had to suggest which ones to use to analyze it would be the Rush one because Rush's lyrics are pretty outspoken, thoughtful and just plain out awesome. Another one would be the Joe Strummer and the Mescaleros one for pretty much the same reason.