You should watch demos, although I get the appeal of watching them on youtube - much more hassle free.
https://www.youtube.com/playlist?list=PLR8S6x_ZnHJ2E5NOayzCDX55RAKYHec53
Here's a playlist I made a while back with some POVs on youtube that helped me quite a bit, but with demos you can really watch any player, you aren't restricted to whoever uses this render service.
Also it doesn't really matter if the POVs are old or new, you can learn something from anyone at any time, meta hasn't changed that drastically as far as scout goes.
To go along with your deathmatch practice I'd recommend you give this video a thorough watch, try take it all in and then implement it ingame
https://www.youtube.com/watch?v=LBfk5PBY-Mg
Slin isn't any DM god by any means, but this mindset helped me out so much, just taking a step back and thinking of the advantages etc instead of mindlessly clicking and pressing a,d,a,d.