Honestly it's mostly the new capture card I'm using. The Micomsoft sc-512n1-l/dvi. It's true 1080/60p with RGB32/4:2:2 color space. It's the only internal card I'm aware of that can do that under the $1500 range and it was about $335. There's an external that can for a bit cheaper but for lossless recordings, USB doesn't really handle it. PCI-E 2nd gen or higher is necessary I think.
I also just used Xsplit to capture this instead of Dxtory and the Lagarith codec which is 100% lossless. I didn't go completely lossless as I don't think Xsplit is capable of it but it's fairly close on the original video. That short video was about 700megs!
I'm also using a new codec for Sony Vegas Pro 12 that's giving me a much better render. It loses a tad bit of color richness but it totally matches YouTube's highest recommended stats for an upload which means it doesn't get altered very much. I've been recording/rendering stuff in super high quality for a long time for YT but the format always gets wrecked by the YT encoder and makes the videos look way worse there. I finally figured out that matching their required settings goes a long way toward avoiding that problem.
Comparing the YT vid to my local, raw video; the local video IS better but it's not much so. The colors are richer and there's a bit less pixelization but overall, I think it worked pretty well on the tube.