One, no it's not. It's your FIRST important audition. If you are really good, there will be others.
Two, you're audition tape could be perfection, and you might still not be right for the part -- never take rejection (Oh, that word.) determine future success.
Three, without seeing your vid or knowing what you are auditioning for, it's impossible to give you anything truly tangible.
(break a leg, though.)
If we're not having fun, then why are we doing it?
These are DISCUSSION boards, not mutual admiration boards. Discussion only occurs when we are willing to hear what others are thinking, regardless of whether it is alignment to our own thoughts.