Recording Console Gameplay for youtube

[shixx]

I have a Dish network DVR, it's hooked up to my TV through an AV Cable under TV1 but has another set of AV under TV2 so could I just simply (ha it's never this simple) plug my PS3 or Xbox AV cable into the TV2 slot? If that wont work will getting a Splitter that will connect the PS3 and TV into the TV1 section of the Dish DVR work? or Plugging both Dish DVR and PS3 into the same AV input on my TV?
If it's not possible Period would you mind suggesting another way of Recording My PS3 and Xbox360 Gameplay and getting it to my PC.

I have a Radeon HD 4870 1GB Graphics card on my PC that I could run an S-Video Card to and get some kind of Recording Software maybe, but I heard that will lag. I was also Thinking of getting a Dazzle DVD recorder but that wont work on my OS.



I'd appreciate any info or possiblities you might know of that I could do to Record my Gameplay and put it on my PC.


Thank you!


-Shixx