Control
This section covers Map Control: item control, weapon control, positional control, spawn control, etc.
Control is fundamental in AFPS game modes from Duel to TDM, CTF, and even CA or Wipeout. Control comes from the gaps between you/your team and the opponent/their team. These gaps can involve your knowledge of item times, your positioning relative to pickups or power positions, your positioning relative to which weapons each side has, where the spawn logic will put someone, etc.
Items
item timing by phylum https://youtu.be/9MWZrcDVdkE
Nice timing visualization of major items: http://2.bp.blogspot.com/-4DHIdAiWFtg/TeYsE-TmgRI/AAAAAAAAAJQ/ws-zhtfyNrY/s1600/WSqhm.jpg
Timing in Quake Live on Bloodrun explained by ZorakWar: https://www.youtube.com/watch?v=ERs7Hag9gok&t=1s
Basic Timing Guide by Memento Mori https://steamcommunity.com/sharedfiles/filedetails/?id=564011815
Weapons
How to Fight Against Each Weapon in Diabotical https://youtu.be/gOLj-q10MLA
Positioning
Better positioning - ImageOmega https://www.youtube.com/watch?v=6lkwPTdZ6-I
Strenx Quake Live Duel Positioning https://www.youtube.com/watch?v=59_4L7whg1s
How to learn a new map (two examples) https://www.youtube.com/watch?v=VQPi-0OKe94
Spawns
The idea of how spawn system in duel works showed by heatmaps of many Quake Live maps (download zip and launch html files in your browser): https://drive.google.com/file/d/0B9IzHwNkFKsqVE9OS25HRmVpNFU/view
Diabotical spawn logic updated with new maps as of 2/22 : Thanks to Code187 & @SakiiR : https://www.diabotical-france.fr/duel-spawn/
Vengeur Explains Spawns https://youtu.be/te4qFJKgwwU
Mode Specific
Duel
King's QL duel guide https://web.archive.org/web/20130629141828/http://www.quakelive.com/forum/showthread.php?1667-Quake-Live-Duel-Guide
holysh1t quake live duel guide https://www.holysh1t.net/introduction-quake-live-duels/
Game Analysis series by rtcwtwister (contains deep level analysis of Quake Live duels on pro level): https://www.youtube.com/watch?v=XPSBNnXmYqk
Kovaak teaches Quakeworld duels https://www.youtube.com/watch?v=pLmuRRm1Bag&list=PLxP7tvMqaXzDjw7OYYIEbplCdZOaHLFPg
Kovaak Advanced Reflex Dueling Strategies https://www.youtube.com/watch?v=_7G_oDtWkSg&list=PLxP7tvMqaXzBGG8VV4LqaUddV1WrErMXS&index=9
tek-9 ql duel guide https://web.archive.org/web/20100914213901/http://www.tek-9.org/articles/quake_live_duel_guide-268/introduction-1.html
Quake Duel Theory by DDK https://www.youtube.com/watch?v=n2tdDZWSGy4
duel school with Phaze: bioplant https://www.youtube.com/watch?v=xWiuyIWYpRM&t=1939s
duel school with Steej: perilous https://www.youtube.com/watch?v=y8fpa0F4eLA&feature=youtu.be
wolfy guide to ztn https://www.youtube.com/watch?v=WrKavWxA4iU&t=30s&ab_channel=WolfyFromPoland
Macguffin
Intro to Macguffin Mode: Macguffin 101https://youtu.be/_LG0uAQTcwk
TDM
Preparing for solo-queue TDM https://www.youtube.com/watch?v=nes5IomV0i4
CTF
High Level CTF games WITH voice communications (QL) https://steamcommunity.com/sharedfiles/filedetails/?id=317192198
Massman's CTF Guide https://playmorepromode.com/guides/cpma-ctf-gameplay-massman
General Gamesense
5 pillars of Quake by Zenaku (aim, position, movement, strategy, timing) https://www.youtube.com/watch?v=N5iJu9g9jWk
4seasons gaming old quake guideshttps://web.archive.org/web/20120626210523/http://www.4seasonsgaming.com/guides.php
The ultimate Quake Live Guide by Yakumo https://steamcommunity.com/sharedfiles/filedetails/?id=315482318
Reflex combat tips by Kovaak https://www.youtube.com/watch?v=UwLmgDOO1Vo&list=PLxP7tvMqaXzBGG8VV4LqaUddV1WrErMXS&index=7