Maybe my story will grant you some advice? I am a gamer and an engineer with the 'hobby' of having a 5yr involved relationship. Sorry it is a bit long lol, but i think this will give you a perspective on what it could be like:
During high school I was better than most MLG players at Halo (3 and Reach) and Call of Duty (MW2 and up) to the point where I would get 1.75 to 2.0 k/ds in MLG games. Public matches on the other hand were absolutely destroyed by me lol. I would get nukes in MW2 every 5ish games, it was great! I am saying this because I needed barely any practice at all or time spent trying to get good gameplay
Now when it came to physics I was also awesome at it in high school, getting 95's and 100's on exams in high school physics and up to calculus based college physics 1 and also 2 with barely any study at the university of michigan - flint. (a satellite campus of a very prestigious college).
So I was very smart, which is very important for being good at videogames. Quick and probabilistic thinking is essential in being good at video games as you know.
But then I transferred to the actual university of michigan campus to study engineering, I am in my 2nd semester now and it is miserably hard. I feel dumber than I ever felt and my test scores are only average now. There is no possible way I could keep up a youtube channel with school now, despite being very good at games and having the advantage of getting good footage more often than most. I am doing homework like every hour in order to go home and spend the whole weekends with my fiancee. We still play video games but not nearly as much as we used to because we are busy with school, and we pretty much don't have fridays, saturdays, and sundays to do what we would be doing if we didn't have each other. If you stay out of a serious relationship, then you will have 3 more days of the week than i do!
So I would say this: I think it will depend where you go to school at. As long as it isn't a super prestigious school, you should 100% definitely do it both and you probably won't have much struggle! If you are planning on maybe going to a prestigious school, try to not get pinned down with after-school clubs or with a serious relationship like I am in, and you can probably still manage to do it! It just might end up being hard at times but that's okay. Maybe you're smarter than I am too which would give you even more of an advantage! But the WORST that could happen is that your youtube channel gets in the way of your grades and you need to stop. But more than likely, what will happen is you would only have to take a break from your channel for like a week when exams come by :)
Youll be totally fine! I encourage you to do it!