Here is this young engineering student making lots of videos on engines and explaining in simple language and hand drawn diagrams all aspects of engines - whether it is horsepower related, exhaust systems, brakes, ecu, and what not. His youtube account is
'EngineeringExplained'.There are a few others who have great youtube sites -
'Eric the Car Guy' and
'Scotty Kilmer' who are professional mechanics work on cars. Eric makes real time long and detailed videos though Scotty is fun to watch as he makes short and entertaining videos.
Just picked a few from Engineering Guy - though his list is very long ! Great going.
We discuss these topics fairly often in RE Forum.
http://www.youtube.com/watch?v=Ivgp1LBsGEQhttp://www.youtube.com/watch?v=bgS3PA5r0vYhttp://www.youtube.com/watch?v=XVDXLW3P7q8