Making the stuff shown in the previous video a little bit more usable.
In 1.8 this can even be made with only 1 headless sticky piston, using the following setup: http://imgur.com/PDv9RDN
However that setup does not work in 1.9 snapshots.
Edit: In 1.13 this particular contraption no longer works.
However there are still ways of breaking bedrock in 1.13 using headless pistons.
In 1.13.0: /watch/0ArEL9xSZT5SE
In 1.13.1: https://imgur.com/a/ZdjGKxF (left headless piston is normal, top headless piston is sticky)