I watch some Canadian youtubers and it seems that what you call a sweater, I call a sweatshirt.
Sweaters are the things knit with yarn.
Is there a reason?
I’ve got bad news for you; they also use “sweater” to describe what you’d call a “hockey jersey.”
There are slight differences between the names used for all the different sorts of the garments worn on the outside above the waist in all the English-language dialects (American, Canadian, British, Australian, New Zealand, whatever).
I ran into the variable name for the knit woolen garment, as a transplant from the US to Europe.
What Americans call a “sweater,” the British call a “jumper.”
These, in the UK, are “jumpers.”
As an American, when I hear “jumper,” I think of this.
Regional differences in vocabulary are fun!
Canadian here. Never heard a sweater referred to as a sweatshirt.
A sweater is knitted from wool, and typically worn to keep warm. See the examples posted by @Cervaise .
A sweatshirt is something you wear at the gym. You’re likely to sweat in it as you work out. It is definitely not knitted.
I watch a car detailing Youtube channel occasionally, and the guy is in Canada. Once as the scene shifted, you could see he’s put on what I, as an American, call a hoodie or a hooded sweatshirt.
He said he’d had to open the garage door to do something to the car, and it got so cold that he had to go put on a bunnyhug.
Is that really a Canajun (Canadian) thing??
What about a fleece? Not a sweater, not a sweatshirt. But a heavy pull over. Often associated with hiking/camping.
They are my everyday wear.
A bunnyhug is regional, never heard or used here in Toronto.
To me, a sweater is knit and could be cotton, wool, cashmere or anything else. A sweatshirt is woven cotton or blend and always casual.
A knit item is a sweater.
A cotton blend whatever sportswear item, I might call either a sweater or a sweatshirt. If it has a hood, I’ll call it a hoodie (regardless of front zipper or not).
A hockey jersey is a jersey, I never call it a sweater despite the translation from the Roch Carrier story. I do call it a chandail in French, or, specific to the Habs in deliberate contexts the terms un tricolore or *la sainte-flannelle" .
I’ve heard the terms bunnyhug and kangourou, the latter is occasionally used where I live, in both languages, but never the former.
By some coincidence they were talking about this on CBC this morning in Ottawa. Apparently it’s a Canadian prairie term for a hoodie.
Yes, it’s the term I grew up with. It’s gradually being supplanted by “hoodie”.
FWIW, these are the exact same connotations of the terms down here near the mouth of the Mississippi River. Maybe we’d have more varied terms for these items if we’d have more occasion to wear them 
American/Canadian man with a British spouse here. I had never heard “jumper” to refer to anything other than a sweater (or a deer). I have no word for the overalls/dress thing.
Words I know for sweater-like things: sweater, sweatshirt, poncho (words I use, all from my American upbringing); cardigan, jumper, hoodie, fleece (words I recognize: “hoodie” wasn’t an established term when I was growing up).
I think the only Canadian-specific clothing item I use is “toque,” mostly because I didn’t have one in California.
Agreed.
Other way around. I know a bunch of Canadians who call a cotton sweatshirt a sweater.
Haven’t heard bunnyhug in forever.
And they think drinking milk out of bags is weird!
A teeny tiny nit-pick(heh, or knit-pick?). All fabric is knitted or woven(a kind of knitting).
Well, I’m, forevermore, calling my hoodies Bunnyhugs. Love that 
.
Though a Canuck myself, I am not a fan of the bagged milk thing. I’ve seen a number of references to bagged milk on various reaction videos about Canada.
We don’t drink milk out of bags. We store and pour milk out of bags!
I love the bag thing.
If I can get refills of soaps and things in bags it makes me happy.
I recently bought dairy cream in a bag. It had a little screw top that made it handy.
I hope this trend continues.