That doesn't work here. How did you get this file in the first place? What browser addons do you have (all of them)?
There was an extension I was using in firefox called ant video download. It was something I been using for a while and it has been working flawlessly for over a year never had a problem. Recently I have noticed that the file extension had webm after downloading a video from youtube.
I just installed dropbox thinking that it would work like and ftp never expected it was going to try and play the dam file lol Sorry about that.
Well I took torreydale's advice and installed another download firefox ext and that seems to have taken care of it. I assume you are in no need to have that file right? It's like 15mb big kinda small for a video file and maybe thats why it had only audio. makes sense...
Kinda new to ftp and drop box stuff.
Note: I noticed the website associated with the ant downloader is moving to another server maybe after they finish that it will be looking after this.