I like the idea of this. However, a few suggestions:
The audition just lasts too long. It stops being funny about halfway through. I'd rather watch the video if it was a minute long, it would be tighter and funnier throughout.
The back-scratch joke..I just don't see that as being funny.
I would make the ending less...abrupt. It's just the girl auditioning, the people at the table pretending to like her, and then just..talking. You should end it with maybe a scene of the people conducting the audition asking her to try harder, or telling her she probably didn't get the job, and her response to it. That way, you can have more jokes, as well as showing the apparent talents of Alisa more.
But it was a really good concept, those are just my opinions.