Here's another video; a piece by the great R. Crumb. Not quite L.A. related, but to me poignant and in keeping with the then and now images that we enjoy. (It could almost be Cahuenga Blvd.)
Also, vaguely related to urban development (or sprawl), I've noticed something looking at the old photos here and wonder if others agree. In the early pictures of L.A. it seems there are very few trees, compared to today's cityscape. Inn the early photos of L.A., Hollywood, mid-Wilshire, and the hills, I mostly see scrubby landscapes, with not much that is vertical to block the view.
In a lot of the old shots, I get the impression that one could turn around in a circle from most anywhere in L.A. (except right downtown) and get a pretty good panorama of the hills and mountains. In modern L.A. it's much harder to find such views, especially in the lower lying areas. I notice this over and over when taking "now" photos; the difference is quite startling at times. Obviously the buildings all block the views, but in a way, the trees lining both sides of most streets block the view as much as they add to it. Not that I'm anti-tree...just an observation
R Crumb's A Short History Of America
• http://www.youtube.com/watch?v=3ym5n-ZZWUs" target="_blank">Video Link