As soon as I saw the subject matter I started looking for that same video.
Pretty neat trick.
Fortunately it's been a long time since being aground but like all things of this type it's just a matter of time until it happens again, especially in unfamiliar waters.
Using the boom or mast
to heel the boat is the most direct solution, using the anchor
to kedge also helps but it all depends on what kind of keel
On a full keel
boat heeling and reversing may work, if not your going to have to use a combination of kedging, heeling and motor
Or, just wait for the tide.
Only been stuck waiting for tide once in 35 years, fortunately the cooler was full of beer
and the passengers were happy with that.