nothing unusual in that
I have four and I use my vacuum on them especially before I clip them...............you'd never believe the dust that comes out of the coats and their coats feel like silk afterwards cause they are completely dust free..................
Yeah I guessed the vid wasn't a normal hoover, just wasn't sure wether Samerlin meant she uses her vacuum as in vacuum vacuum, me and wishful thinking.......
If you get a lightweight hoover with long hose that you can carry around, you just need a brush that clips on the end; there used to be a company that made them especially. Just watch the cable.
They're no different to clippers and the horses usually push themselves into it, must be a nice massage to them.