Tip for FULL screen Video player

I've been on a long hiatus on a MAC so still re-learning all
the quirks, commands and cobwebs.

I was was able to download a video conversion player from .rmvb to AVI but this player can only play in half screen mode.

Anyone using a video player that can convert .rmvb files
that can play in full screen?

Any recommendations or direct links would be great.
cheers.

 

Hey man just downloaded the player and to my
amazement it works!
thx for the headsup!