MeltyBread - America's main Melty Blood Website. Here you can find news related to Melty Blood's community and a forum outlining much of the information here for each character.
MeltyBread's Youtube Channel - A great place to find Melty Blood Actress Again tournament videos and casuals. You can also find the occasional character combo video.
NicoNico - Here you could find more Japanese videos if you have an account on Nico.