I was looking around on Youtube for your basic how to do seams videos and came across these guys who work in canvas and have a whole host of various tutorials on all aspects of sewing which I thought folks on here might like to have a look at.
[video=youtube;-s4gubcEymQ]https://www.youtube.com/watch?v=-s4gubcEymQ[/video]
[video=youtube;-s4gubcEymQ]https://www.youtube.com/watch?v=-s4gubcEymQ[/video]