audio background in yahoo.mail

Hi, dear Yahoo.mail administrators!

I would like to ask if it is possible to add musical background to my letters, which would automatically start with their opening.
I usually send a Youtube link to greet someone and tell people to klick on it before starting to read the e-mail. I think it would be great if the music started simultaneously with the opening of the letter and no reminder was needed. Have you got any Yahoo.mail audio library, something similar to the yahoo.mail 'stationery' store or is there a special brouser for 'audio background' files in Yahoo.mail?

Greetings:
kidikova@yahoo.com