"123 TV" is a name used by several different entities, including 123.live, a mobile application for live TV streaming that is available on the Google Play Store; a community group on Facebook focused on health, wellness, beauty, and fashion topics; and 123-movies.net (or similar sites), which are platforms for watching movies and TV shows online. There's also a software package called 123tv-iptv on PyPI, likely related to IPTV (Internet Protocol Television).