The videos they’ve uploaded that struck me as particularly useful were ones like “Weiss mill power feed installation”, and “WBL290F stand installation”.
There are, nevertheless, some slightly dubious working practices on display in some of them, e.g. drilling into the closed and fully assembled electrical box on a mill in order to fit a Z-axis motor. Judging by the comments on that video, however, Weiss do at least seem willing to learn from criticism.