Not only are his videos quite funny, but they can also be beneficial to your Japanese language studies, since he always explains what he is doing, and so you can pick up on quite a few verbs as he talks. He also uses English sometimes, and some of his videos are subtitled.
Here are some of our favourite Hikakin videos:
Super spicy instant yakisoba
“Interesting Cake Shop” DIY sweets kit (Almost entirely in English!)
Mega-takoyaki kit from Don Quijote (Also learn a takoyaki recipe!…Sort of!)
Russian Roulette spicy snack sticks (Only one in 6 of the snack sticks is super spicy, so you never know when you’re going to get a hot one. Play it with your friends and see who is the unlucky one!)
His Youtube channel is here; there are many more interesting food videos, as well as Japanese game reviews and weird product explanations.