One link on Google? Problem solved!

http://themineville.com/misc/how-to-record-minecraft-at-720p-with-fraps/

Guessing at the link, you can probably understand what trouble i've been having, i used to use BrenyBeasts Mod but since the 1.2.4 update it is kinda... unuseable, so thank god i found this!
Use it, if you want to record Minecraft videos in 720p resolution!