It's an extension for downloading music and videos from VKontakte.ru / VK.com.
Extension adds download buttons for music, and download links for videos; it supports natural filenames for downloads.
You can get file size and approximate bitrate for audio files by clicking on duration. It may be displayed automatically if configured via extension options.
Opera versions below 15 include following limitations:
* natural file names are not supported;
* videos are not downloaded on a simple click; to download video right-click on a download link, and use “Save Linked Content As…” command from the context menu.
- This extension will access your data on some websites.