Allow users to view the recordings of our previous Public Panels and TechTalks

[Marina Alsahawneh]

Is your feature request related to a problem? Please describe.
It would be better if we added a link to the recording of our previous events where applicable (e.g. public panels, techtalks, etc...) in order for users to be able to easily access the recordings of those events.

Describe the solution you'd like

• Add a button or a link to the single event component that redirects users to the recording of that event (if any) on our Facebook page.
• Changes to the API should be made as well.

Kudos to @rayasharbain.

[Issa Mahasneh]

This should be implemented in the Activity content type, rather than Events. Activities retain info about events after they happen. Marking this as invalid.