There are three minor notes, none of which prevent approval but which I'd strongly suggest addressing to improve this even more.
16:40ish - you can tell Biff is about to speak right when it cuts - cut a second earlier or insert some grumbling
45:30ish - audio cut slightly abrupt, maybe lead with a western sting?
1:44:52ish - slightly abrupt cut with audio, also recommend playing a little musical sting to transition smoother