Challenge-TV
From QWiki
Challenge-TV was a site that holds demos for various games, but mainly QW and CPMA.
CHTV was started in 2000 by Dethkultur, Hoony, DonKing and Agent. It is currently maintained and scheduled for a site-wide overhaul by DonKing and Putty. A lot of hard work and dedication has made CHTV the #1 source for game recordings.CHTV has over 22,000 demos!
www.challenge-tv.com (original website - defunct)
Lolek's backup: https://quake1.pl/demos/chtv_demos/