Category "w3c-validation"

"The frameborder attribute on the iframe element is obsolete. Use CSS instead."

I'm trying to validate my website with the W3C validator but it doesn't work. I have a YouTube iframe and this is the error: The frameborder attribute on the i

Why is 'projection' an invalid value for the media attribute in a link tag?

According to the w3.org validator: <link rel="stylesheet" href="css/style.css" media="screen, projection, tv" /> does not seem to be valid anymore due