There are probably dozens of ways to make a picture frame using can-sheet-metal, can-tubing, and ingenuity. This is my way:
Just make an 8-slice can and cut out panels from it. Use those panels to make small tubing. Then join that tubing into a square shape using ordinary staples and the joining staples technique.
Make the hanger for the photo frame by tracing and cutting the outline of the tab itself and poking a large hole in it, as shown in the pictures in the video above.
Reinforce the photo if necessary by adding an aluminum-sheet backing which you made by removing the top and removing the bottom of a can, cutting the side, and trimming it using scissors.
Incidentally, we don't yet sell the plastic joints shown in the picture above, but we hope to one day.
Note that you can also connect tubes by running dental floss, fishing line, or strong thread through them and knotting the ends together.