Most DME buses make up to 4 stops, 3 being the norm. There is no way to tell, with any certainty, what stops a bus will make on any given route. BLT route could also include WL, Polynesian and GF. Or it could include completely different resorts. Most likely it will be as above.
But, routes do change. I have been taking DME to BW since it's inception. The route has never been exactly the same twice. It 'usually' consists of...BW, YC/BC and CBR. But it has also stopped at the S/D (for those on a land/sea pkg), and at POR-FQ.
There is just no way to tell for sure. But it is usually 3 or 4 stops.
As far as entertainment goes, yes, there is a little movie. It shows Mickey and his pals arriving at the airport and then getting to WDW on the DME bus. It is really pretty cute. It comes on automatically, at a certain point in the ride..it doesn't start as soon as the bus leaves MCO.