An auditorium is a place of learning. You might want to start by checking the degree of soundproofing. You could then check the availability of equipment - is there a blackboard or flipchart, for example, or a video projector? Auditoria for 50 people or more will need sound amplification equipment.
The venue for a video shoot is chosen according to the subject matter, as well as practical considerations. Spacious lofts with high ceilings allow you to transform the interior into whatever setting you please.