The "bk.ru" part of the keyword refers to one of the most popular email domains in Russia, owned by .
If you are looking for modern versions of what this keyword represented, the landscape has changed: kamera bk ru rapidshare
If a file was too big for an email (which most "kamera" videos were), you would upload it to RapidShare and post the link on a forum or in an email. The "bk
RapidShare has been replaced by Telegram channels, Yandex Disk, and Google Drive, which offer much higher speeds and security. The "BK" community has largely migrated to VK
The "BK" community has largely migrated to VK (VKontakte) , which integrated the file-sharing and "kamera" culture into a single, massive ecosystem. kamera@bk.ru_grozniy-moskva :: video.mail.ru
Having an address like username@bk.ru was a status symbol of the early Russian internet.
Around 2005–2010, users were moving away from film and beginning to upload high volumes of personal photos and short video clips.