If you would like to master hide glue then this short YouTube video by John Bullar, author of "Furniture Making, A Foundation Course," should set you on the right path. You might also like to subscribe to his You Tube channel: http://www.youtube.com/user/johnbullar
Hide Glue is often sold as granules and called 'scotch' or 'pearl glue.' It is an extremely strong, gap filling glue, which has the property of pulling surfaces together as it dries. It needs to be applied hot, and hardens as it cools. It has the great advantage over PVA that you can reheat it and the glue should re-melt, allowing you to remake joints or reposition veneer. If you want to use it as a gap filler you can mix in pigments to match the wood. The main draw back of this glue is that it is not weather proof, so for indoor work only.
See also Youtubes most popular woodworking video