Clamping Mitered Corners

Having a frame with 45 degrees mitered corner is a clamping challenge. Lots of solutions out there. Just search on Google, Pinterest or You Tube. Pick your solution and you may be happy with it. Some look great in a photo but I suggest you try them before using them on a project.  I found problems with some. Unfortunately I discovered when the glue was  spread already and I was ready to clamp.

A great solution is shown in the photo below. It is on You Tube but it does not come up in the search on the first or second search results. Maybe because the descriptive text is in Russian!

It looks like this:

The video that shows how to make it, is here:
https://www.youtube.com/watch?v=Wlrx1QLUAs4&index=8&list=LLUr1MZqUXbovcI8obZac30A