The best way to integrate movies in powerpoint is to upload it to youtube and then embed it into your presentation.
In this way, yournpresentation will not only be very light in size, but it can also be distributed via mail without loosing the connection to the source file.
An internet connection is the only requirement.
To embed a youtube movie in ppr, you insert a shockwave flash object and chamge the settings. You can find a simple and short tutotial ( even with a free download template where all the work has been done for you):
http://www.powerpointinfographics.co...-in-powerpoint