Comment by walthamstow

I assume it's because you're doing something you'd rather not do to benefit somebody else, much like you'd jump on a grenade :p

I thought it's like hopping onto a bus. Then it doesn't take a lot for "hop" to change into "jump".

You would jump on a call before video was involved. Not even necessarily a conference call either, you could jump on the horn etc.

It just means to start doing something, no great mystery.

I always thought it was just a metaphor for suddenly leaving whatever you were doing at the time. You’re doing something else, and then you jump on a call. You don’t mosey on over and show up on the call fifteen minutes later.

That's just a standard meaning of the word jump. You're jumping from whatever you were doing to a video call.

It seems like it has the connotation of being spontaneous and not requiring preparation.

That has nothing to do with the video aspect, but the group aspect. "Jump", "Hop" and the like are making a group call analogous to a bus ride, where people can jump on and off.

This was a result of Zoom's acquisition of the band House of Pain.

Maybe it's a hint that the operation is irreversible! :-)