1937 Grand National

The video covers a prestigious horse race with 32 entries, including six American-owned horses. King George and Queen Elizabeth attend the event, which is steeped in English tradition. The race is a challenging 4.5-mile course with numerous jumps, where many horses drop out before the end. Royal Mail emerges as the winner, securing a $50,000 purse, while the event influences global betting markets.

Describe the role of Royal Mail in the race as per the text.

What does the phrase 'countless millions changed hands' imply in the context of the sweepstakes?