Dagnabbit, I'm at work again and can't see the videos until I get home tonight.
I have one lonely 3phase outlet in my garage (the legacy of the PO who ran a small business out of the garage), hence the need to put plugs on my machines. It's nominally 400v. And there's 230v single phase as well of course, for normal appliances. All 50 Hz.
Cheers, Vann.