I'm fairly certain a prosecutor could get rape charges to stick against a women video taped sexually assaulting a drunk male. Just none have had the desire to bring such a case non anal raping of drunk men is simply not considered a crime.
I'm not even sure if it can actually be rape, even under your circumstances. I believe it changed a few years ago, but up until recently, "rape" was literally defined as penetration of the penis, into a orifice of the victim. So even if some lady held you down, and used a strap on to fuck you, it wasn't rape. However, some time ago, as far as I know, it was changed so that any object which "penetrates" now constitutes as rape.
But that still means, it can't legally be "rape" if a woman drugs you, gets you hard and "rapes" you. As long as she doesn't penetrate you, it's not rape. Even if she keeps you in a cage and makes you perform at gun point--not rape. This is how it was explained to me, but I haven't done my own research, so if I'm wrong, someone please let me know. But, supposedly, this is one of the reasons why rape statistics for young boys is below sexual assault statistics, because female molestation can't be rape.
The feminist author who first perpetuated the 1 in 4 women statistic is one of the people that advocates against classifying molested children as rape victims. Here is a quote from her.
"Although consideration of male victims is within the scope of the legal statutes,it is important to restrict the term rape to instances where male victims were penetrated by offenders.It isinappropriate to consider as a rape victim a man who engages in unwanted sexual intercourse with a woman.p. 206"
How is that for some hypocrisy?