Thanks for the video. Regarding the challenges, if you get stuck on one, it might be a good idea to take a break and come back to it later. Sometimes, after a short break, the solution becomes clearer.
33 isn't a very complicated challenge; it's actually quite simple. I recommend taking a break and coming back to it from time to time. There will come a time when you'll see the solution and be able to solve it. Also, you should practice, because later on you'll face truly complex challenges. Cheer up!

