Kinda Generic,,,but where do I start

I have been using newsgroups for years....always been a huge notch in the belt. But here is my question. I have been grabbing some television series .WMV rips the play on the 360 natively. Since my recent *.mkv containers will not play on the 360 and there is no real easy was to convert, .....is there a newsgroup dedicated to WMV rips the play on the 360??? There were several posted on the alt.bin.game.360 group, but they have faded, so Im assuming they have moved to another group. Any input appreciated, Thanks