I can't see the video (China won't let me see youtube... it's blocked).
Don't think that rapid control inputs are a "technique". It's more a question of doing what's required when it's needed (most of the time only small inputs are required, including during landing). When landing you're going slower, so the controls have less air going over them, so larger inputs are required. People say that the controls are "sloppy" or less sensitive. Depending on the conditions (e.g. strong / gusty winds) significant control inputs may be required just to keep the wings level. This sort of thing you "just learn" and don't actually think about.
One thing I've seen some people do (on both large and small aircraft) is "pumping" the elevator during the flare. So far I haven't been able to find a good reason for doing this and have put it down to poor technique.