You have to again log-in with your YouTube account, which was used for creating the stream.
YouTube tokens are automatically saved to your browser's cookies, therefore we recommend not clearing your browsers cookies. If you access the the stream again via another browser, or have cleared your cookies, you will need to log-in again.
It is a security measurement so only allowed/authorized individuals can modify the stream.
If you prefer to use Safari on iOS, be aware that Cookies have to be enabled.
Please go to Settings:
Then scroll down till you reach Safari settings. If you enter the Safari settings, you must scroll down until you reach Privacy and security. There is the option “Block all cookies". It's important to have this option turned off otherwise you will not be able to use our App.