I just finished another knot tutorial. Let me present ABOK #2274!
ABOK #2274 (from the knot bible Ashley's Book of Knots from 1944) resembles the Prolong knot (#2242), but is wider and rounder. I used 5mm thick cord and about 4.5 metres to double this knot.
Remember, on YouTube you can choose to slow down the speed if you want!
Enjoy. :)
/Fanny