Do you know what Pando Media Booster really is?

The Pando Media Booster is a tiny (2MB) UI-less client that enables you to cost effectively stream full-screen HD video by leveraging your viewer's collective spare bandwidth. Running as a secure transparent background service on your viewer's computer, the Media Booster optimizes video streams by intelligently streaming your videos from multiple sources; your CDN servers as well as the computer's of other viewers ("Peer Cloud")

I wonder why my Youtube videos run faster after uninstalling it though...