1) Yes, you download the CDLC from the Ignition portal which you can get to by pressing "CDLC search" at the top. 2) CDLC is free, official DLC released by Ubisoft isn't. Also if an official DLC gets released, if a CDLC version exists, it gets taken down. 3) There is zero lag, at least for me, I also use headphones at it works perfectly. 4) I would strongly advise against that, as that would cause lots of sound and input lag. I just play at my PC as I would normally game on. However, I tried streaming to my TV using a Steam Link, but there was a huge sound delay (almost 2 seconds!) so yeah, not a good solution. Also you don't need to spend $1000 on a PC, RS2014 has very low system requirements.