I think each person will probably have a different take on that question. Mostly because each of us has a different style/approach when making a video review.

If there are any specific users whose video reviews you really like, maybe you could do a mentorship with them, or even an unofficial mentorship just PMing them to get tips and advice. Feel free to watch some of my video reviews, if you like them, shoot me a message - I'd be happy to help you with yours!

In my opinion, some of the most important things to keep in mind are good lighting, good editing, keeping things very brief, and not just repeating everything you said in the text review. I also think it's important to respect copyright laws if you use any images or music in your review. I don't know if that helps, but if you have any more specific questions, feel free to ask!