I use Youtube all the time. Its a great resource for quick informative videos. Obviously watch them ahead of time to make sure they are appropriate. Someone has posted a video on pretty much every situation/problem. Its a great learning tool that I use a lot in the classroom. One example is listed below.
https://www.youtube.com/watch?v=B2_A1GCHKds&index=5&list=PLErb8yT0fKjce1YWjtBCugJAmZND2BrYNI use this video in my construction class along with many others to illustrate labs that we are going to do.
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