Shawn - Is that a clip of Frank Robinson? Interesting on several levels if it is - he only played one year with them (1972), and it looks like he's in a local park or HS field (the bleachers), but he's still in full Dodgers uniform. I've never been in Dodgers stadium - don't know what the practice field situation would have been like 40 years ago...
Yes that is Frank Robinson. The video is from Ted Williams instructional tape. I think several of the hitters were filmed at different locations.