The employees who work in the office for youtube or google probably make the minimum wage which is $10.50 to $13.00 per hour depending on what part of California you're in.
So an office employee for google working roughly 8 hours a day would earn roughly $104.00 per day. And that's not really a lot of money in California.
The software engineers might earn $50.00 to $100.00 per hour or more depending on their skill level and what job they do.