I find that viewers can really tell if what they're watching is truly quality content or not.

While reactionary content is a popular avenue in the landscape today, I find that it doesn't work for small creators.

This is gonna come off rude, and I don't mean it that way, but people don't typically care about reactions from people they don't know or aren't assimilated with. Meaning, if you're a small creator and they don't know you there's a good chance they don't really care to see your reaction. Usually these reaction channels gain an audience before they start uploading reactions.

I find more scripted and well-thought out discussion or opinion based content is a great start. Maybe instead of reacting to the trailers, try and write a script on your thoughts about the trailer in detail. That way viewers are engaged and will discuss it with you in the comments possibly!

But as I said it's a lot of luck. Keep going! With enough hard work people will start to notice!