GG, I'm sort of surprised as long as you've been hangin' around here that you don't have a video put together. Do you feel like you have reached the point that you have something to show? What are your immediate strengths? Put yourself in the coach's seat that you are reaching out to... you have to tell them something that will make them want to note to take a look. GPA, HS/travel accomplishments/highlights, 60 time, etc.
You could still put together a few short video clips with your smartphone and email as an attachment or text. Get in a cage and have someone take some video of some cuts with someone doing front toss. Have them take shots of three cuts from behind and three from the side. Get several clip series of three cuts and pick a few good sequences to send. You could do the same with some OF throws from RF or CF to 3b. Have someone taking the clips from just behind you and have someone hit fungo's where you field OF ground balls and fly's and make the throw. The shot should be lined up from behind you to your throwing target base so the coach can see footwork, throwing motion, carry, trajectory, etc. Just shoot one rep at a time and again, pick a few good reps to attach. Combine it with other relevant info like " 60 time officially measured by XXX is 6.9. GPA is 3.75 with 3 AP classes. Hit .350 and made all-league as a sophomore. Etc. Be specific with why you are interested in their school. If you can't get that put together in time, provide as much relevant info as you can and let them know your team and schedule (if that's the way the event is set up). Then, just go and play hard, have fun, be yourself and don't try to do more than you are capable of.
Good luck and let us know how it goes!