I'm not opposed to milk bags.....<snickers and grins to self> or milk in bags for that matter.

I just thought it was a bit odd at first. Would actually take up less room in the fridge too.
Well, yes, we have had milk in bags (eh?) for probably 30 or so years here. As Resto said, it's really just something I've always taken for granted. Knew it wasn't a thing in the States, but didn't know it was Ontario-only......thought it was a Canada-wide thing.
So, I have made a pictorial for y'all. Yeah, yeah, ya saw the video. Well, guess what? She's TOO YOUNG to know the whole drill.
First of all...........scissors, who uses scissors? Ya gotta have a "Snippit". That's a little doo-dad designed specifically for milk bags. You can either hook it on the side of the jug, or stick it on your fridge with the little magnet on back. Personally, mine is on the jug, that way I never lose it. Secondly, you don't just snip off one corner, you do BOTH corners. That way, it releases the vacuum, and the milk pours out beautifully.....no worries about the bag tipping over when you start to pour a fresh one. Geez, it's not rocket science! Also, as you will see in my pics, I have a handy-dandy milk bag container that you stack all three bags in, then pull out the fresh one from the bottom. There's even a little slot on the top to put the "best-before-date tag" in, so you will always know that your milk is fresh. This unit resides on the bottom left side of the fridge (right next to the Lakeport, you'll notice), with milk bag/jug in front........takes up little room. Both the outer bag and the milk bags themselves (rinsed out, of course) go into the blue box for recyling. Personally, I feel better knowing that my milk is going into brand new bags than a washed out jug.
Anyway, for those of you that care, here are my pics: