YouTube blocks all users from streaming for the first time for a period of 24 hours to prevent spam.
If it’s your first time, follow these steps to request access:
You’ll then see a page like this — click the red Request button to enable streaming:
Once 24 hours have passed, you'll gain access to YouTube’s Live Streaming page.
There, you’ll find your Stream Key. Don’t change any settings — just copy the key to your clipboard.
Now go back to your YouTube account — your live game stream will be visible.
Click the Share icon to copy the live stream link and share it with your friends and followers.