May I create a reaction video to someone's paid course on YouTube?

Is it illegal to create a reaction video to someone's paid course on YouTube? Will I face any legal issues or potential consequences if I do so? I want to ensure that I'm respecting copyright laws and avoiding any infringement on intellectual property rights.

Absolutely no problem with Youtube. But it depends a lot on the owner of the content you react to. But if you do not expose their paid content, but only comment or rate it, then it is completely compliant with the law and the platform.

as long as its a proper reaction and not
just eating a bag of crisps