 <p><strong>LISTEN TO YOUR ERRORS!</strong></p> <p>I don't mean to sound rude, but the problem is up on a soapbox outside your open window with a loudspeaker:</p> <blockquote> <p>res\drawable-xhdpi\video-unhover.png: Invalid file name: must contain only [a-z0-9_.]</p> </blockquote> <p><strong>must contain only [a-z0-9_.]</strong>, This tells you that only lower case characters <code>a</code> through <code>z</code>, numbers <code>0</code> through <code>9</code>, the <code>_</code> and <code>.</code> characters are allowed in XML filenames. Your filename has a hyphen <code>-</code> in it. </p>