As far as single stream, Disney's Hotstar claimed 59 million for last year's Cricket World Cup, and as far as the YT platform, the Chandrayaan-3 lunar landing hit 8 million.

100 million is a lot of streams, let alone 300. But also note that not every stream reaches a single individual.

And, as far as the 59 million concurrent streams in India, the bitrate was probably very low (I'd wager no more than 720p on average, possibly even 480p in many cases). It's again a very different problem across the board due to regional differences (such as spread of devices, quality of network, even behavioral differences).

I remember watching the last season of Game of Thrones on one streaming provider, which topped out about 3.5mbit but claimed it was "1080p".

Give me a 15mbit 640x480 over 3.5mbit of 1920x1080 for that type of material any day.

Yes, I don't think anyone's disputing that.

> I remember watching the last season of Game of Thrones on one streaming provider, which topped out about 3.5mbit but claimed it was "1080p".

Why the scare quotes? That's a perfectly reasonable bitrate using modern compression like H.265, especially for a TV show that's filmed at 24 fps.