Pinning Posts is currently not possible. However, you can Download Posts And Comments. Please view the Community article for more details.

Currently, we cannot tag a user in a channel. Please share any feedback by submitting a support ticket, and we'll let our Product team know.

No, there is no way to contact your admin on the channel. Please share any feedback by submitting a support ticket, and we'll let our Product team know.

No, invites can only be sent out by individuals currently. Please share any feedback by submitting a support ticket, and we'll let our Product team know.

No, there is no way to contact your admin on the channel. Please submit a request to us, and we will connect you with the channel administrator. 

Chanel owners and moderators can post in a read-only channel.

No, the live feature is not supported. Please share any feedback by submitting a support ticket, and we'll let our Product team know.

You can preview Youtube video links. We don't support embedding videos from other platforms.

Here is the Help Center article to post as a service (host) in Community.