Изменения в php script

Plz go to freecorn dot org you can see my website on the left side you will see the donation buttom when you click on it you are go to the palpay payment page I want add video ad (30 secs) between click on and go to the paypal page.I need to be able to add video ad, of course each time ppl click on will be different video ad showing up. and after 30 sec it will redirect ppl to the paypal donation page. this is the mean thing but i don't want anyone to do this only for members so you also need to create a member login page require name and valitd paypal email(because they willget awrd by goin so) when they login to the member page the only thing they will see is the rules wich I can do all that and how get pay by donation.