Invisible Mend-Split Seam

This is one that I get quite a lot.  The boys try to be a bit too active in an overcoat and the seam under the arm gives way.  The video shows how to do an invisible mend on the seam.

Black on black is not the best way to demonstrate this, but it's all I had.  I will redo as soon as I have something else to mend in the same way.  I do hope the commentary will be useful for you.  Any questions, you know where I am.