1 – image / video upload in dashboard. Click on the plus icon wherever you want to add it. You will see a list of elements you can add. I’ve attached screens shots showing examples of the plus icons and the elements list.
2 – Appearance > Menus. Select Side Menu and edit as you see fit.
3 – Click on the create group link in the group directory or you can do it in WP admin > Groups.
4 – I’ve answered this previously: “You add fields by creating them in Users > Profile fields. Its in the Buddypress documentation: https://codex.buddypress.org/administrator-guide/extended-profiles/”
Here’s a link to the Buddyapp documentation that goes through some of the questions you are asking: https://archived.seventhqueen.com/documentation/buddyapp
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