> <http://www.adobe.com/devnet/flex/videotraining/>

The links on the page look like:
< li>Video: < a href="javascript:var target=window.open(
<http://link.brightcove.com/services/player/bcpid1681730258?bctid=1606789336>,
'FlexComparingFlashFlexFlashPlayerandAIR',
'scrollbars=no,resizable=no,status=no,width=1030,height=820');"
onclick="s_pageName='DevNet: Flex Training: Video: ' +
this.innerHTML;sendAnalyticsEvent();">Comparing Flash, Fl

First you have to allow the external site(s) (+link.brightcove.com/* is the
easiest.)

But even if you got the pop up page downloaded it looks like:

var config = new Array();
...
config["playerId"] = 1681730258;
createExperience(config, 8);

There is no way to convert that and get the video.

Can't be done.