Long Tail Cast On With Two Skeins

How to use two skeins of yarn to cast on in knitting.

[asredbirdy]

Clever stuff this - would never have thought of that.

[MetroidMann]

Thanks for the quick tutorial! I have a pattern (the Andor by Linda Marveng) and it starts with "Using a long circular needle and double yarn, cast on 250
sts. Continue with single yarn and work in rib." I read in some forum post (which I cannot find) that this is to make the cast on stronger. When she says to use double yarn, do you think she means the method in this video, or to cast on as if I were to knit with double yarn (even though we switch to a single yarn)? I am not sure.