TV and Movie Extras in Alberta and BC?

The best way is probably to register with an extra casting company in your area. The website of your local film commission probably lists some. Often when a production company needs extras they contact these casting companies to provide them. The casting company is like a job broker, they don't hire you but they let you know about openings. Some casting companies may charge you a fee to register - so research the companies to make sure it's a good one.

Of course there will have to be filming quite a bit in your area in order for there to be extra work. And you'll need a flexible schedule because it's not unusual to be called the night before to be on set the next day. If you have to travel or spend the night - those are expenses you pay. Companies don't pay extra's traveling expenses.

And frankly extra work is not acting. It's more like being breathing scenery. It involves a lot of just sitting around and waiting. Then you do your background thing (cross a street, stand in a line, or whatever) then you wait and do the same thing again. It can be pretty boring. Often you'll be asked to provide your own costume. And non-union actors are basically paid minimum wage - so not a big income provider.

But some people do like it as a hobby so it's fine to look into. So investigate how much filming is actually done near you to see if there really is extra work available. Then start by looking at the website of your local film commission. Sometimes they list calls for extras and usually they list contact information for companies that support the film industry (like extra casting companies). Then research casting companies to see which one(s) you might want to register with.

Good luck

This is an interesting question, and one that made me curious for quite a long time.