Check out the brand new full-text search on https://asciinema.org
The search index includes recording titles, descriptions, and FULL TERMINAL SESSION CONTENT!
It’s powered by PostgreSQL’s native FTS engine.
For syntax check the search tips - there’s a link on the right side of the search results page.
The results contain public recordings, and if you’re logged in you’ll also be able to find your own recordings, including unlisted and private ones.
EDIT: it will be included in the upcoming release of asciinema-server.