If you do age in a barrel it will be much longer than on chips. Even though there is more wood in a betray there is less end Grain which slows the process down and creates a superior product. Also plan on extra beer to top off the barrel since you will have to top it off sue to evaporation.
It doesn't loom that off to me in the video. It should cascade like it was, you have to pour half the beer let it sit then finish the pour. Go to the Guinness website I think they have pouring suggestions.
This is basically what happens with the widget. Good find. I am about to brew this recipe and I do have a beer gas set up so I am quite excited to see the results.