With this Google Chrome/Firefox extension you can embed external video content without annoying ads.
Check it out on the demo page.
For server side you should add this code:
<puremotion style="display:none" data-token="_YOUR_PERSONAL_TOKEN_" data-loader="iframe" data-width="728" data-height="335"></puremotion>
<iframe src="_EXTERNAL_VIDEO_URL" width="728" height="335" frameborder="0" scrolling="no" allowfullscreen></iframe>
and the clients should install the extension.
You can download the latest Google Chrome extension here.
You can download the latest Mozilla Firefox extension here.