About 6 years ago I was getting yips over shorter putts so I started using side saddle putting for shorter ones and it worked well so I use it for most putts now... even from off the green... with side saddle I find that my distance control is much better and I can leave a lot of long puts within that mystical 2-3' circle. For longer putts my main focus is on distance control... with side saddle you are typically pretty much on line unless you misread a swinger so distance control is the key factor to getting within the circle and every so often they just go in the hole (some days more than others it seems).
I use a conventional length putter with a conventional girth grip. My left palm is actually on top of the putter and my right hand grabs the shaft. I line up the putter lines with the intended line and my feet also point along the intended line. Usually the ball is about even with the front part of my right foot. Then I swing the club back and then forward. Very similr to the woman in the video.
For shorter putts...inside 10'... I'll focus on a few blades of grass or a spot at or near the cup and will not look at the ball. For longer putts I focus on the ball.
I have a lot of confidence in being able to get down in two from just about anywhere on the green... my bigger issue is getting on in regulation.