Answered below by David, please let us know if this doesn't fix you issue.

Not off the top of my head... You could add a button to the page. Onclick you could change the the width and the height of the youtube iframe to be 100% width 100% height.

There are a few ways. One is to edit the files that are stored in js/cache/ the easiest way is to make changes to the static content on the zip app website. Download the new app and then copy the js/cache folder from the new app to the old one overwritting the data.

adding $max-results=50 will enable you to have more than 25 as Thomas suggests below. The API doesn't allow us to fetch anymore.

We should move this to documentation

This should now be fixed in the code we added to the site this morning.

This should now be fixed on the Windows 8 version.

This is now fixed

You can embed Iframes in static pages... But it's not obvious. Write your iframe code in a browser. Open the HTML file in a browser. Select the I frame, paste into the static article in ZipApp. Alternatively you could add iframe support the app in Visual studio.