Hello, most likely you have Safari.

Before downloading a video, hold down the <Alt> button and then the download button.

Hello, please, send us more details regarding the problem.

Hello, please, send us more details regarding the problem.

For the better understanding it'll be great to see a screenshot with the error. 

What is your Operating System?

What’s your country?

How is the name of your browser?

Hello, thank you for contacting support in Savefrom.Net
This bug is known to us, we will try to fix in the nearby future.

Hello, Unfortunately, we don't fully understand you... please. provide us with more details regarding the issue.

Hello, in order to help you better I need the following information.
Please, send me the information listed here: http://en.savefrom.net/user.php?info=1

Do you download via the extension SaveFrom.net Helper or the website SaveFrom.net? 
For the better understanding it'll be great to see a screenshot with the error.
We are waiting for your reply, and thank you for contacting us Savefrom.net Team!

Hello! Our help will be more effective, if you copy and send us info about your browser and the Savefrom.Net extension:
http://en.savefrom.net/user.php?info=1
We'd also need some links you can't download (to test them).
For the better understanding it'll be great to see a screenshot with the error.
We are waiting for your reply, and thank you for contacting us Savefrom.net Team!

Hola y gracias por contactarnos. Por favor, bríndenos algunos detalles adicionales con respecto al problema. ¡Gracias!

Hello, please, send us more details regarding the problem.

Hello, this site is not on the list of supported resources. The full list can be found here: http://en.savefrom.net