I should not act surprised to hear that people are beginning to look to YouTube and Wikipedia as "reliable" sources of information, but honestly, I'm shocked and even disgusted by it. 
I even hear that college students are even using references to Wikipedia for college papers and research.  This is terrifying.

This recent Canadian report suggest that YouTube videos (related to vaccinations) are filled with faults and these misinformed videos are viewed MORE often than educated videos.

YouTube as a Source of Information on Immunization: A Content Analysis

The Internet is a wonderful thing and I FULLY support online research.  However,  we must view all information as suspicious and consider it's source.  Wikipedia, YouTube, and other openly populated informational sights can be a good starting point of information, but they should not be considered factual without further study.
What makes Wiki and YouTube great, is also it's downfall. 

Remember:  Knowledge determined by the majority does NOT make it true.

I think Galileo & Copernicus would agree with that.