To share the recordings of your past streams on your profile page, simply navigate to Streams->Past streams, and click "Publish as a post" from a 3-dot menu.
You can edit the post headline, and the description. The video will be added automatically.
These posts will be visible to anyone who visits your Superpeer profile. If you want to remove it from your profile, you can hit "Unpublish" from a 3-dot menu in the Past Streams tab.