Celebrities turn out for opening day of Santa Anita's fourth racing season

The video covers the opening of the new season at Santa Anita, highlighting $1,000,000 worth of improvements for the 50,000 attendees. It features celebrities like Al Jolson and Ruby Keeler. The main event is a race where the horse Hadeed, a favorite, wins the Santa Anita Derby. The video captures the excitement and key moments of the race, including the performance of other horses and the final results.

What significant improvements were made for the new season at Santa Anita?

Who are some of the notable stars mentioned in the text?

What is the name of the horse that won the Santa Anita Derby in 1936?

What was the betting odds for the winning horse mentioned in the text?

Who was the winning horse written by, as mentioned in the text?