This You tube thing is amazing, no more running off to the library to find a technical book written in greek to trouble shoot something. There is a down side, some people can make big screen quality videos but know nothing about the subject or are not really good at speaking to the average person.
I just had what I am 99% sure is a AC compressor lock up. So I jump on You tube watch a couple videos and go try to test the capacitor. I won't go through the entire story, can't get a micro farad reading on my multimeter, borrow the neighbors, same thing. Stumped.
None of the videos mention that the average meter a DIY'er has will measure over 20 micro farads. The least expensive meter I could find that will measure over 20 was in the $50 range. HTH