If you prefer speed over excellent quality, you can try to record using MPEG-2 video codec. MPEG-2 is not resource intensive. And it gives good quality.

MPEG-2 it is a video codec used on DVD-Video discs. If you plan to create DVD-Video discs from your screen recordings, it is recommended to record using MPEG-2 video codec. Then you can use DVD authoring software that allows to create DVD-Video from MPEG-2 .mpg files without any quality loss.

Note that MPEG-2 video files need to be DVD compliant to avoid recompression. Recommended settings DVD compliant settings:

1. Video:
   720x576 (PAL) or 720x480 (NTSC), up to 9800 kbit/s
2. Audio:
   - AC3, 48 kHz sampling rate, 1 to 5.1 (6) channels, up to 448 kbit/s
   or
   - MP2 48kHz, 1 to 7.1 channels, up to 912 kbit/s

Also note that it might be easier to use screen video capture software software like WM Capture / Replay Video Capture that allows to record into DVD-Video format.

Please learn more about DVD Authoring Tool software that you plan to use, what input files are recommended and how to set up the software to avoid recompression.