Glaciers have been calving huge icebergs into the sea for as long as glaciers have met ocean. Those icebergs eventually melt and collapse just like this.

Rising temps contribute to the rate at which icebergs are produced and the speed at which they melt, but there's nothing in this video in particular that wouldn't have happened 200 years ago aside from the motorboat going by at the beginning.

Look at the glacial retreat around the mouth of the fjord (which is why tourists go to the town) and yeah, the amount of change is insane.

Any particular iceberg isn't that interesting, but the source! That’s the sad part.