hi Mu, nice to see your “line” experiments 
about the video/technique - I cannot see very well in the video how the strokes/details look like, but - I would say - you can achieve similar smooth blending (while still keeping details) with oils too, either on paper or canvas (diluted with terpentine or other oils); personally, I prefere oil painting/blending much more for “blended” paintings, as oil painting lets/allows you “undoing” pretty much (in early stages, when not dry, you can completely “redefine” your painting, as you may wish; very flexible and “safe” technique, for me) … but I do not use acrylics very much, so I do not want to /cant compare which technique is better …
a.







