This culture/attitude of constantly trying to level-up various skills in ones life like its a video game skill tree and always being "productive" is tiring and could be worse than my advice because it could very well lead to mental health issues of anxiety and depression.
A lot of the advice in this thread is your self-improvement cliches of become an early riser, focus a little at a time, set a timer, etc. that show up every time someone has a similar question. Sure some of that stuff might work, it also might not.
What I suggested just might get someone out of a funk. Try and force yourself to get to the burned out phase earlier of media consumption. I tend to get bored of things (usually after recognizing predictable patterns), but it takes a little while. I don't view it as "wasted" at all. Our minds need time to idle and recover. Just check with yourself if you are enjoying it and stop when you're not.
If you are working on switching careers or trying to learn something on a timeline (i.e. learn language before business trip) then that is different. It's work, not a hobby. You should set goals and probably follow a schedule of sorts. OP asked about hobbies though.
If someone works hard and spends their evenings watching movies or TV shows or YouTube for the majority of their career, so what? They are better off than 95% of the humans on the planet probably.