I've been having problems with YouTube for weeks, and recently my wife has been having problems accessing Facebook. Some video's stream and play fine but others will only play for second or two and then freeze.
I did some speed tests using location-based tests on Speakeasy.net and noticed that my speed was fine to most points around the country except when I ran the test to New York, the results of that test were coming in around 2-3MBS, which made me think that Verizon is having an issue between my location (Pittsburgh, PA) and New York. I have the Quantum service (70Mbs) and my speed between Pgh and NY is usually much faster.