Hello, Unfortunately, we don't fully understand you... please. provide us with more details regarding the issue.
I save a video as Mp4. It goes to my desktop, but the extension is missing - the extension has been stripped away - so the file is there as a little white box icon. I click and rename it so it has .MP4 on the extension part and everything is fine. I use VLC as my default Video app. So the icon changes to the VLC Cone icon. Running Win 7 64.
Do you download via the extension SaveFrom.net Helper or the website SaveFrom.net?
Please, send me the information listed here: http://en.savefrom.net/user.php?info=1
Send a couple of links to the video that you download, for the test.
Customer support service by UserEcho