Youtube Live Help Page:
https://support.google.com/youtube/topic/9257891?hl=en&ref_topic=9257610
1. Enable live streaming
To live stream, you need to have no live streaming restrictions in the past 90 days and you need to verify your channel.
From a Computer
- Go to YouTube.
- From the top right, click Create Go live.
- If you haven’t already, follow the prompts to verify your channel.
- Enabling your first live stream may take up to 24 hours. Once enabled, you can live stream instantly.
2. Choose a way to stream
There are three types of streams: mobile, webcam, and encoder. Choose the one that’s best for what you’re streaming.
Mobile
Good for vlogging and quick updates from your phone or tablet.
You’ll need 1,000 subscribers, and a phone or tablet with a camera.
Webcam
Quickly live stream from your computer using a webcam.
You’ll need a computer with a webcam.
Learn how to stream with a webcam.
Encoder
Encoders let you stream gameplay, overlays, and use hardware like preamps, mics, and cameras. This type of stream is commonly used for gaming, sporting events, concerts, and conferences.
Learn how to stream using an encoder.
https://support.google.com/youtube/answer/2474026?hl=en&ref_topic=9257984