I\'m piecing together a cheapo app that amongst other things \"frames\" some of our websites... Pretty simple with the WebViewClient. until I hit the video.
WebViewClient
I know this is an very old question, but have you tried the hardwareAccelerated="true" manifest flag for your application or activity?
hardwareAccelerated="true"
With this set, it seems to work without any WebChromeClient modification (which I would expect from an DOM-Element.)