Okay, so I know this is a bit obvious... But this is how you can match the mood of the trailers with music.

Music is extremely important when making a trailer! If you had sad music playing for a comedy trailer, what would the viewers think? They would expect the story to be angst, drama, etc. You want your trailer to tell the genre of the story without words. Remember: music can change the entire mood of the trailer if used incorrectly!

For angst, sad, tragedy and historical sort of genres, I use classical songs. Although, this is just my preference. It depends on the person, and how well you can match the video clips. (which will be made into a tutorial later~)

Examples:

And for Comedy, fluff, things fitting into those genres, I usually use upbeat songs. Like, ones that would sound they could be from an OST of some sort, I guess?

Examples:

Action and thriller trailers, usually use dubstep, rock, and some other genres.

Examples:

The genre of songs aren't necessary for these types of trailers. This is only my preference and what I like to use!!