Www.echocobo.com.mkv
It could simply be a renamed video file from a site called echocobo.com. If the site is legitimate (e.g., a creator’s portfolio), the file might be safe after scanning.
www.echocobo.com.mkv seems to combine a website address (www.echocobo.com) with an MKV video file extension. MKV is a video container format, not a web address. It’s possible this is a typo, a renamed file, or a placeholder. www.echocobo.com.mkv