Not what I'd consider a killer feature, but it's definitely one of the advantages.
Now, what is killer is that the recording is just a text file, so I can edit it and check it in to my source control system, rather than having to mangle some screen recording environment and check in a binary blob that's hard/impossible to edit in the future.
It's also pretty universally guaranteed to work since it doesn't demand much of the browser as far as weird javascript features go, and means I can deliver a whole screen recording in the fraction of the size of an MP4 file. It's screen resolution agnostic, making it more functional for a wider class of users than a video. I also don't have to ship a different version of the recording if I want a high contrast version for accessibility reasons.
So, yeah, plenty of reasons to use asciinema over a conventional screen recording.
Now, what is killer is that the recording is just a text file, so I can edit it and check it in to my source control system, rather than having to mangle some screen recording environment and check in a binary blob that's hard/impossible to edit in the future.
It's also pretty universally guaranteed to work since it doesn't demand much of the browser as far as weird javascript features go, and means I can deliver a whole screen recording in the fraction of the size of an MP4 file. It's screen resolution agnostic, making it more functional for a wider class of users than a video. I also don't have to ship a different version of the recording if I want a high contrast version for accessibility reasons.
So, yeah, plenty of reasons to use asciinema over a conventional screen recording.