How do I easily create a launch site?

Well, you could set a cookie in the visitors browser once they registered and check that cookie every time someone visits your launch site. However, you will still need some kind of login functionality for registered visitors. They might have cleared the browser cache, switched to another computer or just using a different browser on their second visit making the cookie-method useless.

What kind of functionality are you looking for?

It sounds very similar to this:

http://www.warriorforum.com/programm...only-once.html

The script posted there both sets a cookie and also tests if a cookie is already set. Depending on whether it's set or not, it will show a specific message.

Shouldn't be too difficult to implement for your site

Here is a free password script from javascriptkit.com; if you change the success page to your video page, and the failure page to your sign-up page, it should help. You can also add this html to your login page: If you are not a member, you can sign up <a href="http://www.yoursignuppageurl">here</a>. Change the text where it says 'yoursignuppageurl' to whatever your sign up page URL is, such as "http://www.mydomain.com". (Add this below the form.)

Put this code in between the body tags of your page. (I would not use this if you need serious protection, it is easy to get around, but it should help you separate out who has signed up and who has not.)

---------------------------------------------------------------------
<form>
<p>ENTER USER NAME :
<input type="text" name="text2">
</p>
<p> ENTER PASSWORD :
<input type="password" name="text1">
<input type="button" value="Check In" name="Submit" onclick=javascript:validate(text2.value,"free",tex t1.value,"javascript") >
</p>

</form>
<script language = "javascript">

/*
Script by Anubhav Misra (anubhav_misra@hotmail.com)
Submitted to JavaScript Kit (JavaScript Kit- Your comprehensive JavaScript, DHTML, CSS, and Ajax stop)
For this and 400+ free scripts, visit JavaScript Kit- Your comprehensive JavaScript, DHTML, CSS, and Ajax stop
*/

function validate(text1,text2,text3,text4)
{
if (text1==text2 && text3==text4)
load('success.html');
else
{
load('failure.html');
}
}
function load(url)
{
location.href=url;
}
</script>

<p align="center"><font face="arial" size="-2">This free script provided by <a href="http://javascriptkit.com">JavaScript Kit</a></font></p>
-------------------------------------------------------------------------
To change the login/password, change "free" and "javascript" inside the script (text2.value,"free",text1.value,"javascript"), respectively. You can change them to whatever you like, and give your sign-ups the username and password. (Everyone gets the same username and password with this script.) To change the destination URLs, modify "success.html" and "failure.html." (load('success.html');load('failure.html'); in the script above.) You can make the success page your video page, and the failure page should direct them to your sign-up page.

It won't matter about cookies, just if they have the username and password.

Hope this helps, if you have any questions, let me know, I'll try to help.