Another video about some of the things to look for on your fish finder. (Rocks, Trees, Clay, Sand, Thermocline, and baitfish)
https://www.facebook.com/pages/The-Fishing-Partner-YouTube-Channel/335467843221608
Other videos –
How to Read the Less Expensive Fish Finders
http://www.youtube.com/watch?v=ZPmzLRcA7Z8