Graduation rate is upward of 90% at USNA for a reason. They will not take a flyer on him if there is no chance for him to get the grades required to progress towards graduation. No idea what his academic background is but it doesn't feel like a traditional academy resume. Prior enlisted get into academies all the time but not sure it is the same steps as appointed. Also, it can't help his chances with BUDS/USNA that he acknowledged prior head injuries on youtube.