Help picking a Video Making program

Hey guys I'm a high school basketball coach wanting to make a couple hype videos to get the community, and players, excited for the upcoming season. I have ideas of what I want to do, but not sure what program to use. I want it to be as close as professional as possible. Can someone point me in the right direction? Also, I would prefer free.... You know how teachers roll, but if paying extra is worth it I will check it out. if it can be used to help the kids I am always willing to pay.

Thanks guys.