Stream offline functionality

[Shrinks99]

Currently the player just defaults to the last known good block of video. We need some way of the stream actually not being live for when we are not broadcasting.

[darkdrgn2k]

could possibly be triggered by

    on_connect
    on_play
    on_publish
    on_done
    on_play_done
    on_publish_done
    on_record_done
    on_update
    notify_update_timeout
    notify_update_strict
    notify_relay_redirect
    notify_method

[Shrinks99]

There's a nice codepen for tv static that we could probably use if we wanted to go the fully in browser route because that would be neat :P