Viewtube ryhmes with Youtube, its not a typo, and that genre of site has been around much longer than youtube has been a thought. I wouldn't hesitate using it as a video sharing type of site given I wanted to enter that route. Lik I said above 'I'm not a lawyer' But I don't see how a ryhme can fall into a legal battle unless you show intention of ill will. Yes, Google tends to win alot of battles and drag on others. They've lost many, and people are seeing that they are the biggest copyright infringers on the planet. Crawling personal information on the net is the biggest issue. And they have been sued for that specifically and lost.
Just my 2 cents, good luck with it.
Jack