Welcome to Hubzilla, @RockyIII , @Ich selbst , @Hiroki , and @james pyduck !
 
what do you mean with  channel content ?
  last edited: Tue, 20 Mar 2018 10:46:05 -0400  
See this post.

Still no answer on a public hub with federation enabled. You might try going to the  https://start.hubzilla.org/siteinfo.json path for the public hubs listed in https://start.hubzilla.org/pubsites and looking at the addons listed for each until you find one.
  
The public hubs hub.libranet.de or gerzilla.de were recommended as places with federation you could try.