Advanced countdown timer wp plugin

Greetings,

Hope life is easy on you.

If I may request, can you suggest of a countdown timer wp plugin wherein the countdown would only start once you view/visit our video sales letter (vsl) page and it should be unique for everybody? What's more, it will be then cookied.

For example:

Mike is viewing our page today so the countdown timer starts right away.

Then John is going to view the page tomorrow, so the countdown timer would start once he could view the page tomorrow.

We are currently using clickfunnels for our video sales letter page. The problem is clickfunnel's countdown timer can't handle that. In their timer settings, we need to set a "FIX" end date so the expiration date will be the same for everyone.

The expiration date should be 4 days after their first visit of our video sales letter (vsl) page.

The problem with a fixed/specific expiration date is that what if the potential client happened not to visit the page right away, chances are he/she is going to miss the offer.

I hope you understand what I am trying to put across.

Thanks for at least reading my post.

Any help and input you may provide will be highly appreciated.

Thanks,
Louie