There's no native support for Windows due to completely different way of terminal is implemented in Windows and Unix-like systems. But there are some options to have it working, see this thread: https://github.com/asciinema/asciinema/issues/150 (use a fork, or run asciinema in WSL bash).
Thanks for that one, very funny, hahaha. Sure you can try to invite our nice terminal-juggling mouse friend at some huge old heavy sweaty dusty elephant home and see if they play well along.
Short answer: a windows-friendly hackish branch exists. And original works if you're actually running asciinema in the port of Ubuntu that Microsoft ships with recent Win10. Does it satisfy any use case that you had in mind?
