Add Secure Stage Overview video to handbook

Why is this change being made?

Adds video showcasing Secure to the marketing handbook where the demos/videos are displayed.

Does this MR meet the acceptance criteria?

Yes

Assign to DRI

• Did you assign this change to the correct DRI of the page or information you are changing?

Conformity

• Added description to this MR explaining the reasons for the proposed change, per say-why-not-just-what