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Youtube and netflix likely do this to discover TVs that you can cast your video to

• space_drops 7y ago
  Then Apple needs to implement an API handler for casting video to TV, instead of letting the app handle it.
  • fluffything 7y ago
    It already does? AirPlay / AirDrop .
• amaccuish 7y ago
  As far as I'm aware, AirPlay is handled at the OS level so the individual apps don't need permission for peer to peer AirPlay. And of course standard AirPlay is all mDNS for discovery. For ChromecastI believe it's either SSDP or mDNS, and I don't think they have a P2P casting option IIRC.
  • saagarjha 7y ago
    The Cast SDK uses Bluetooth so "guests" can cast to your Chromecast.