the sharing system used for this video implies that some technical information about your system (such as a public IP address) can be sent to other peers.
The recently added video <x id="START_LINK"/><x id="INTERPOLATION"/><x id="CLOSE_LINK"/> has been <x id="START_LINK_1"/>automatically blocked<x id="CLOSE_LINK"/>
The channel name is a unique identifier of your channel on this and all the other instances. It's as unique as an email address, which makes it easy for other people to interact with it.