Youtube and twitch (which I belive use akamai?) was down for me in Norway.
I think there were many routes going haywire and it was different depending on your location.
Twitch is not using Akamai.
Youtube is Google's own global CDN, Twitch is Fastly.
Only the main twitch site seems to be using fastly, the streams are powered by AWS' infrastructure as far as I can tell, which would be expected, seeing as how Amazon owns Twitch.
Oddly enough the user interface worked somewhat, it was the streams themselves that failed to load for me (even with mpv+youtube-dl)
Youtube definitely had problems for me. (Through Mullvad VPN in Switzerland)
ISPs often have Youtube and Akamai caches forward deployed to their networks, which would reduce the dependancy on big ISPs. Google also buys a lot of its own international links so it can pair directly with or close to ISPs, so big ISP issues don't affect their services as much.