Here is another of my home made videos on using the one rein mounting block method. This technique has helped me a lot over the years, especially lining up a horse for mounting off a log when out trail riding.
I am so fat and lazy I can't even mount from the ground, but Mac is nearly 16 hh. That's my excuse.
Sorry the videos' a bit jiggly. My friend who took it said it looked like "The Blair Witch Project", it was so rough.