It's not a video, but the Pink Panther book is a great into/crash course on T1D. It was given to us at the hospital when my son was diagnosed: The First Book for Understanding Diabetes https://www.amazon.com/dp/0981538150/ref=cm_sw_r_cp_apa_i_mEnODbC8MYMPQ
We recently got the Dexcom G6 system (CGM). List price was in the neighborhood of $1600 for the receiver, transmitter, and one month worth of sensors. I don't know if that's actual retail price, but that's what was given as list price (ours should be covered by insurance, though they denied it and we're in the process of appealing right now).
Kudos to you for stepping up to help!