I have a TCL 40" 1080p TV set as my secondary monitor. When I watch YouTube videos that don't have a max resolution of 1080p (360p, 480p, and 720p), the player gets pillarboxed when I enter full screen mode. I suspect that this is due to my main monitor having a different aspect ratio. It's an old-ish Dell 2001FP @ 1600 x 1200. Is there a way to force the flash player to do a proper full screen for lower-res videos?