Um...I'm guessing you never cast anything. First thing first. You need to hold auditions in a safe office/theater space. Never hold auditions in your living space. Its not safe for you and its not safe for actors.
2nd. I'd highly recommend hiring a casting director. If you're in a bigger market (LA or NY) you can probably get a casting assistant at a major office to cast cheaply or for free if your project is solid. IE: If you're going to have a good script and high production value.
What is your experience? Be up front with your actors. There is nothing worse than auditioning for a crappy film with no budget and no one on board with experience and being told the exact opposite. Don't BS about pay either: if you're not able to pay your actors make yourself available to get them a free copy because that is the only reason they are doing free work.
You shouldn't have them reading the entire script with you. Pick one or two scenes per actor that have the most extreme levels the actors will need to play. Run it with them. Then, even if they are good, I would redirect them to have them play it differently to see if they are good at taking direction. Definitely record. Do NOT Post the auditions online. It is wrong and illegal without the actors consent. And its rude and uncouth to ask an actor to sign a waiver for their audition. Back when I was non union and I auditioned for non union films I saw this a couple of times....I passed on the auditions.
If this is a union project then you have another set of rules you must follow legally. I'm guessing its not union otherwise you'd probably already know this.
Hope that helps.