Honestly, how do women and girls as the leading ladies or just one of the cuties get on music videos 10 points?

models and actors are cast via their agents - if you're only in it for fun an agent won't be interested in taking you on. Your best chance is to hope to bump into one of the artistes and hope to impress them enough to get you cast thru the back door. Whether you can achieve that statistically, or without "degrading" yourself is impossible to anticipate.