I really poured my heart and soul into this one. It took me a litte over a week, but I've finally done it. You have no idea the hell I went through.
What it does:
It pretty much chases players like any normal spectator cam from another game would. Except this one is built from the ground up.

Anyway, here's what I fixed:
1. Smooth tracking - no more jitter. If it jitters, turn off vysnc and put it on 30fps.
2. Follows vehicles finally
3. Doesn't watch dead people - better player indexing
4. no exception errors, hopefully
5. disables keys when in chat-mode and when halo isn't active
6. a nice pixel drawing I made in paint. (MC and his pet chicken)