Click Install, Roles and groups restrictions do not work for Channel apps, so you may ignore it.
Step 2
Next, go to Zendesk Admin Center → Apps and Integrations → Channel apps → OAPPS Comments for YouTube
Step 4
Click Accounts tab → Press Add account
Step 5
- Press the Continue with Google button
- Grant required permissions to access your account
- Select the channel, you own and want to connect to Zendesk.