I would also match the framerate of recording to that of the media being recorded, or else you will get ghosting or choppy video, especially noticeable on older games. I agree, very thorough.
Well, I rendered all my videos this way.. classic ones with a lower res of 320x240 and rescently released games (mostly 1280x1024) for test reasons and none of this videos got any ghosting or whatever problems.
I would use 1280x720 for game resolution. That is if the game supports WS resolutions - most new games do.
all other newer games that dont support this ressolution should be played with 1280x1024.
And the rendering bitrate I would raise to maybe 5000 or 6000 kbps. This doesn't make much of a difference for older games, but you can really tell on the new games.
2100K results into low filesize for a 11 minute long video: 175MB
3000K is resulting in a 230-280MB big video for a 11 minute long video
6000K (If i am correct its the bitrate for a 1080p BLU-Ray Disk or something above 7500K) and results into a 400 - 450MB big file.