Thanks for the advice!Welcome to the forum, Jedbikes, from Hauptmann in Hurst TX (DFW area).
I've owned both the Mavic Pro and Mavic Pro II. Now I fly the Mini 4 Pro, and I LOVE it. It's totally the one to buy! Congrats on your purchase. From what I've seen on your mountain biking video, you've gotten off to a great start. I recommend that you check out the YouTube videos by The Drone Creative. This guy will help you get quality shots easily.