Integrate recent changes in video demo
Integrate recent changes in video demo

* Make use of the new append syntax which allows appending of multiple
  widgets.
* Change obsolete "createPage" method invocation to "create".

Change-Id: If3ad10e68d2e38d554b56cf1c4f063c8f79fba2b

eclipsesource/tabris-js,mkostikov/tabris-js,moham3d/tabris-js,eclipsesource/tabris-js,paulvi/tabris-js,pimaxdev/tabris,eclipsesource/tabris-js,softnep0531/tabrisjs,softnep0531/tabrisjs,pimaxdev/tabris,moham3d/tabris-js,mkostikov/tabris-js