One huge advantage YouTube has over Twitch is that it ties your existing YT channel to the streaming UI. So for instance, when a huge YT personality like pewdiepie streams, his subscribers will be notified directly and don't need to go to another website to watch and participate in the chat. Also, AFAIK, YouTube has a donation and subscriber system in place so YouTubers can earn more while they stream.
The Youtube notifications are absolutely terrible though. They stick around after the streamer is done, so every time I open YouTube I get notifications like "someone is live!" when the stream ended 8 hours ago.
They stick around because by default ended streams hang around as a video and so you can watch it after the fact. Maybe they need to update the notifications so it can say "someone was live x hours ago"
Yeah but you don't seem to get notifications for people just uploading a plain old video either (at least not by default, unless I accidentally changed something).
I think there is a little bell icon next to the subscription button. If you check it videos send notification too. There is an option somewhere where you can choose which things send you notifications.
