I produce videos and show products and sometimes software. It is showing good and sometimes very bad of the product. I do make money off ads (The video website sells ads).

Never had a problem but having read about trademarks I am wondering what the laws are?

I searched online and it is very confusing to a regular person like me what is considered educational/news and to add to that I read about laws if the trademark is used while being negative about the product.

Much appreciate some pointers.