Yes, by tapping on the photo/video in the conversation you will see options at the top to email the media or share with an existing contact via the Tendant App.
To Archive a previously sent Broadcast: - Tap 'Marketing' on the Tendant Home Screen - Tap 'Broadcast' - Select the required Broadcast - Tap to toggle Archive on or off Only Sent Broadcasts can be Archived, it is currently not possible to archive a ...
To add a contact tap the (plus) icon In the bottom right. Select the (add contact) icon. This will launch the device's native contact application where you can add a contact as normal.