It's a pretty good clip, but I should point out that the guy in the video calls for four egg yolks and a single cup of oil. Note, however, that a single egg yolk can actually hold a cup of oil by itself — though there are risks involved: a single-egg mayonnaise is not very stable. Two egg yolks, though, should be plenty for a single cup of oil. Maybe it's just me, but I think four egg yolks will produce a mayonnaise that's a bit too on the eggy side.
It's just a matter of taste, though, and everything else about the video is pretty sound. You might also enjoy this video on making flavored mayonnaise.