The name appears to be a hybrid of "YouTube" and "Russia," likely related to one of the following: 1. Alternative Russian Video Platforms
A file with the extension is a compressed archive created using 7-Zip , a free and open-source file archiver.
Since 2022, Russia has heavily promoted domestic alternatives to YouTube due to censorship and traffic throttling.
Recent features on Russian platforms allow users to bulk-transfer content from YouTube to local servers.