Restrict who can create organization-wide channels in Microsoft Stream
As an organization you may want to limit who can upload create organization-wide channels in Stream. By default, everyone can create organization-wide channels.
You need to be a Stream admin to change this setting.
In Stream, go to Settings
> Admin settings
Set Content creation > Restrict companywide channel creation to On.
Note
When this setting is enabled, employees will not be allowed to create new organization-wide channels. However, any previously created organization-wide channels will remain in the system and not be automatically deleted.