Help!!! Are there any video's on replacing the ballast in a hybrid ATI light? They are slightly more complicated, and built different, and don't come apart the same way as just a T'5 dimmable light.

Your fixture looks the same as my Powermodule non-LED, judging by the pics on Reef Geek
The end plate at the power cord has screws holding it in place and the ballasts slide out the same after you remove the one screw from the top of the fixture

If it's different, post some pics and I'll try to help you out