There are some dimensions at the end of the video.
I've seen this stand many times and it is really impressive. Just the ease at which you can move the cycle around the garage is reason enough to make one.
they're not hard to make, well, that is if you have a welder and pipe cutter laying around!! the casters are 4", 250# limit each so they'll handle the weight of the cycle fine. as for dimensions, they're listed at the end of the video, the bracket i made for the cycle lift had to be fitted onto the stand, then i welded onto the stand.