The Music Video Contest was a Youtube-based music video contest held by the staff of ROBLOX. It started on February 27, 2009 and ended March 15, 2009.
A list containing most of the entries can be found here:
A few winners included:
ROBLOX-Rox Music Video Entry = Boomdeyada!!! by Bloxmin, theRal, Armitroner, and Sheeppie https://www.youtube.com/watch?v=yGUhCi6l3t8
Roblox Rox: Music Video Contest Entry - by MarioMario54321, goldenhotdogs, swordsmanJRR, and fredoodle https://www.youtube.com/watch?v=OD27f--8ElU