Thanks Klaus for prompt reply.
I became confused after reading the very good
Embedded Web article as part of the recent
7 Benefits of 7 piece in the October Livecode Newsletter. The article leads off by saying that "the new implementation of the CEF Browser Object means that developers can create hybrid apps that incorporate web content easily with consistent content on Mac and Windows," suggesting that we need to use revBrowserOpenCef() when instantiating a new browser object. The Embedded Web article includes a helpful video demo by Ben from Day 1 of this year's conference.
Yet when I look at the stack example provided by Ben for that demo, his code uses revBrowserOpen() - i.e...
put revBrowserOpen(the windowId of this stack, "file://"&stackPath()&"/index2.html") into sBrowserID
Secondly, a point of clarification. Can I use revBrowserAddJavaScriptHandler with revBrowserOpen() or does it require revBrowserOpenCef() ?
Thirdly, and more generally (and forgiving my lack of knowledge - maybe I should have posted in the beginners forum

) ... what does the Chrome Browser allow that the Webkit/Explorer browser doesn't allow? In other words why should I need to use revBrowserOpenCef() ?
Fourthly, the particular problem I have is that revBrowserOpenCef() doesn't allow proper playback of movies. If I create a new main stack, make it a little bigger (say 1200 by 900), and add a button near the bottom of the card with the following script ...
on mouseUp
local tBrowserId,tResizeBrowser
put revBrowserOpen(the windowId of this stack, "
http://www.apple.com/watch/films/") into tBrowserId
put "0,0," & the width of this stack & "," & the height of this stack -50 into tResizeBrowser
revBrowserSet tBrowserId, "rect", tResizeBrowser
end mouseUp
then it works when I play any of the movies listed ... (well except for the fullscreen option on the player controller which I have logged as a bug).
If however I use the same script but with
revBrowserOpenCef() instead of
revBrowserOpen(), then the movie player doesn't load fully. Maybe a bug?
Thanks any further advice/guidance.