Error 400: A maximum of one of the following filters may be specified:, id, mySubscribers, categoryId, mine, managedByMe, forUsername. In case of content owner authentication via the onBehalfOfContentOwner parameter, only the id or managedByMe may be specified..

Domain code: youtube.channel
Reason code: invalidCriteria

Error: No se ha encontrado ninguna fuente con el ID 1.

Ve a la página Todos los feeds y selecciona un ID de un feed existente.