Totally. Shouldn't this and your font files be in a static location on the web?
Your CSS file is already in your resources library, as are the fonts you have, so if you won't need the
When you add the font in the text inspector, you don't need to place anything in the 'Embedded Head HTML'. Your 'font-family' value looks correct. You may not see your font in the preview, but it should work once you choose that font in your Hype doc
As long as you have 'Include in document
<head> checked for your CSS file, you will have the CSS you wrote available to your document. (But as I mentioned earlier this would be better called as a single line referencing the full URL to your CSS file in your Head).
It would be really great if you could post the Hype document so I can dig into this -- screenshots are tricky to troubleshoot.