VCRs - a technical introduction:
http://www.theallwoods.net/studio/hintstips/vcr/vcr.htm
VCR knowledge page:
http://macbase.cg.nu/vcr.htm
Video Response vs. Video Format:
http://www.tvtower.com/frequency_response_vs_video_format.html
Charles Poynton:
http://www.inforamp.net/%7epoynton/
Consumer and Professional Digital Video (DV), Recording and Data Formats
http://www.oakmusic.com/parkplace/video/DVPapers/dv_formt.htm