It's possible to place a object inside inside of the marker in the Map, like a movie of youtube.

<div id=myvideo height=350 width=425><object height=350 width=425><param name=movie value=http://www.youtube.com/v/IDtdQ8bTvRc><param name=wmode value=transparent><embed src=http://www.youtube.com/v/IDtdQ8bTvRc type=application/x-shockwave-flash wmode=transparent height=325 width=400></object></div>

Don't place (double) quotes in the text. If you need a space in the linkTitle use "& nbsp;"

JavaScript must be enabled in order for you to use Google Maps.
However, it seems JavaScript is either disabled or not supported by your browser.
To view Google Maps, enable JavaScript by changing your browser options, and then try again.

Use plugin EasyTube (see: Home page or Joomla extensions)  and enter ['youtube:URL] or ['googlevideo:url] in the text parameter (remove quote after [ ):

{mosmap text='<div id=myvideo style=height:350px;width:425px>['youtube:url]</div>'}

JavaScript must be enabled in order for you to use Google Maps.
However, it seems JavaScript is either disabled or not supported by your browser.
To view Google Maps, enable JavaScript by changing your browser options, and then try again.