I have another post regarding the bugs with playing recordings in the Mupen forum.
I've been using tasvideos for quite a while, I do a panel at Fanime from Midnight - 8 AM showcasing speedruns from them.
And recently I've discovered the Rice video High Resolution textures, and I decided to try and use ENBSeries directx injections.
So far, success! I call it...
64HD
You can see some videos of it running here:
http://www.youtube.com/user/shirowantami
And Screens:
http://img406.imageshack.us/gal.php?g=22591431.png
If you guys want to test it yourselves I can make you a package. Unfortunately the only plugin I'm able to get the injections to work on is Mudlord's Rice Video Build 6.1.4 (And yes it needs to be 6.1.4)
Set that as the Graphics plugin and use DirectX rendering.
Here is the ENBSeries:
http://www.megaupload.com/?d=JVL0AG8A
Just put it in your Mupen folder.
Have fun and I hope we can get it working