lecturer tells and shows presentation on projective screen to packed house of listeners

Name: Lecturer Tells Shows Presentation On Projective
Uploaded: 2011-12-03T00:00:00.000Z
Duration: 15 s
Channel: Pavel L Photo and Video
Description: lecturer tells and shows presentation on projective screen to packed house of listeners Stock Footage Video (100% Royalty-free) 1694854 | Shutterstock