There are some archives of the service here -
https://wiki.archiveteam.org/index.php/Xfire
Supposedly most of the videos, and 20% of the screenshots? I'm not sure if there's a way to easily search the archive contents, rather than download.
There's quite a few profiles on Web Archive too -
https://web.archive.org/web/*/http://www.xfire.com/profile/*
Holy shit. Just found my profile that had stuff there like bio, pc specs and games/hours from when I was 14... I'm nearly 32 now. Wild ...