1. YouTube built their business on other people's content. Just like LinkedIn, Google, Facebook, Twitter, Craigslist, etc.
Aren't we, as the public, entitled to access the data that we, the collective public, have contributed?
How many people that uploaded content want to prevent others from privately enjoying it?
2. A federal judge recently ruled that LinkedIn couldn't block a service that was scraping their service. That scraping costs LinkedIn some measurable amount of money, but I personally think that should be a burden they're required to bear.
If they don't want that burden, let them shut down the service and allow a new service or technology to replace it.