The Hidden Los Angeles website has the complete MGM/YouTube video, titled "Wonder City of the West." According to their blurb, this was the 14th in a series of travelogues filmed for movie theaters by one James A. FitzPatrick, starting in 1930. He traveled the world making these short films, until 1954. FitzPatrick died in 1980.
The producer roams from Olvera Street to Wilshire Blvd., marvels at the Brown Derby and other pre-Googie whimsical buildings, then visits the Hollywood studies and backlots--including Disney Studios (where the girls in their summer dresses emerge after a day of work, followed by men in shirtsleeves and ties). He shakes hands with a young Walt Disney in front of his home. The travelogue winds up at the Hollywood Bowl, with half-naked dancers cavorting on a raised stage.
OK, here's the YouTube link. But if you like LA History, visit the Hidden Los Angeles website too--there's some amazing stuff there. Makes me wish I worked for them., or vice versa.