HDMI/MHL connection restriction

[XspeedPL]

Any app can have unrestricted access to devices connected over HDMI, like YouTube does when pairing. Malicious apps can literally hijack your TV!

[M66B]

What is the privacy issue with this?
Three is no information leaking to a third party this way, or am I wrong?

[XspeedPL]

No information about the phone, but TV's, like manufacturer, model, serial number.
Seems like other data is being transferred over HDMI too, since the YouTube app can pair itself with the TV and CONTROL it too without any user interaction.

[M66B]

Find me the API description and I will look into it.

[XspeedPL]

Looks like it uses Google Cast (https://developers.google.com/cast/) backed up by MediaRouter Support Library (https://developer.android.com/tools/support-library/features.html#v7-mediarouter)