Apologies, perhaps I wasn’t as clear as I thought…
I see the game_change markers when a broadcaster updates their game from their dashboard with the endpoint you showed.
I was wondering if there was any sort of similar ‘marker’ for when a broadcaster changes their stream title from the dashboard. Will the markers endpoint be flushed out with more of these types of time related events perhaps?
My use: I mod for a streamer that plays, typically, 2 games a day. Overwatch and RB6:Siege.
They usually have a witty title in reference to the hostage when playing RB6 but it is usually their 2nd played game of the day.
So when I look up the VOD via the API, all I see is the title from when they first initially went live. The Overwatch title, which may or may not be representative of the entirety of the stream, and I was hoping to be able to get all the titles from throughout the cast.
Hopefully that’s a little bit better explained. 
As I mentioned, I guess I could, in the meantime, log title change events to my own DB (with the casters permission) from the IRC chat (or maybe pubsub??) and get the data that way…