how did u try to install it?
have u red this http://en.savefrom.net/faq.php#ext_inst_chrome

thank you for the feedback)

this a youtube partner's video. we can't get download links or it.

what is your current version of the extension?

did you get an error message? if so, what was it?

If you report an error

Please specify additional data:

address of the page (URL) from where you try to download the file,
links or messages displayed by our website.
If you report an error of extension, please also specify:

version of your browser,
version of the extension.

We've fixed the bug in extension ver. 1.49, please update manually or wait for auto-updating

Try to use opera mobile or mini. It should be working fine

Audio support will be added soon.

We are currently working on this feature. [almost ready]