Omaggi

collect is used to send data to Google Analytics about the visitor's device and behaviour. Tracks the visitor across devices and marketing channels.

GPS is used by youtube.com to registers a unique ID on mobile devices to enable tracking based on geographical GPS location.

VISITOR_INFO1_LIVE is used by youtube.com to Tries to estimate the users' bandwidth on pages with integrated YouTube videos.

YSC is used by youtube.com to registers a unique ID to keep statistics of what videos from YouTube the user has seen.

r/collect is used by doubleclick.net for session management.