[e.cash] Switch back to Wealth Redefined video

Summary:
Future Technology video has been up for a while.
Wealth Redefined video is great, so may as well cycle back to it for a while at least.

Test Plan: Ran it locally, check that the video plays as expected

Reviewers: #bitcoin_abc, bytesofman

Reviewed By: #bitcoin_abc, bytesofman

Differential Revision: https://reviews.bitcoinabc.org/D16039