I wanted to learn to crochet Crocodile stitch, so I went on YouTube and found a tutorial on a bag I liked and went for it. Found the strap on another tutorial and added that one to the bag instead.
First I used this video to learn how to do this and get the general idea.
For the bag I used this video
(did one alteration to the base of the bag, to make it match, I did 1 DC in one of the 7 stitches at the end and 2 DC in the rest of them on each side).
Then for the strap I used this video, it begins at 25 min and 50 sec.