I saw that video a few weeks ago (the first one about waves) and started to leave gaps to cancel out the waves - I was adjusting the nut behind the wheel anyway.
I have two spots on my daily grind to do this. One spot is where traffice from one motorway merges onto the road I'm already on. I tap "merge" but what of course I mean is that everyone joining the road seemingly has to
IMMEDIATELY DART INTO THE OUTSIDE LANE AS SOON AS POSSIBLE, whether or not there is anyone (e.g. me) there.
Although its frustrating to be stuck behind some muppet in a BMW 318, engine screaming as his "ultimate driving machine" fights the laws of physics to gather momentum, the satisfying payback for this comes about 1/2 a mile further up the road. At this point the road climbs quite steeply and the traffic all now congregated into the outside lane starts to back up in waves. And I just cruise past on the usually empty inside lane.
As well as not havign the frustration of stopping in a wave I also don't lose speed I have to make up later, so I save FE.
As for helping others save FE I've kind of given up. If I try to break the waves then I just end up with another muppet an inch or so from my tailgate. Pretty pointless as I now subscribe to the "sharp acceleration back to speed" principle so they end up being left behind a lot.