WordPress Event creation – WordPress Development Stack Exchange

I have to create a site for a specific Event that will last 3 days. This site should only have one page accessible with a password given via the registration form. This page must contain an emblem video. I would like to use WordPress to make it. 3000 people will attend this event at the same time. My question is if a normal hosting can support this traffic without delays.Do you know any plugins that can help me?
Thanks.