Finance.

The video likely worked due to its broad appeal to individuals interested in finance and wealth, utilizing visually striking imagery and a simple, repetitive text overlay to reinforce the theme.

The video displays various scenes related to finance, including buildings, cityscapes, and people in business attire, with the word "Finance" overlaid on each scene. The accompanying caption defines finance as the world of money and investing and suggests it's a path to making a lot of money.