If you want to improve your game and are a new player or veteran, there's something to take from all of these videos and most of the concepts/ideas from videos about 1.6/Source can be applied to CS:GO.
How to be good at CS:GO for all skill levels
TheWarOwl's tutorial series
Curse Pro Tips (many more available separately on Youtube)
Reddit how-to guide
cArn's Theory of Counter-Strike (ep. 1-6)
Vanilla Games (pro POV demos with in-game sound)
How to Clutch
How to Break Bad Habits
- https://youtu.be/65oTInp3yXM
- https://youtu.be/VwRsdzzgW1c
- https://youtu.be/xGOqbvdKvQE
- https://youtu.be/1Xgo3AYx_ow
- https://youtu.be/hQz0oN9W15s
- https://youtu.be/Kd7anaqEXBc
Valve Protips (old but still good for new players)
1.6 Vids (concepts still carry over to CSGO):