Many are now simply too lazy to read a book or scientific PDF or lack the comprehension skills and vocabulary to do so effectively.
The trouble with youtube is its no cost for any muppet to do one and the level of science and facts expressed is often pitiful , and given a credibility they do not deserve.
Which is how chemtrails and other nonsense took root , the tube is contributing to the general dumbing down of society.
chemtrails took root in 1997 when the global spraying began on a near daily basis, pity you're too stupid to see that