Adobe Flash Player Settings 'local storage' pop up will not go away

I didn't see a Flash Player selection that fits, so hope this group is the right one...For the last few weeks when I access a website with a video ability, an Adobe Flash message pops up saying the site wants to place information on my computer.  It offers 'accept' and 'deny'.  If I select 'deny' it just stays and I cannot watch the video.  Please tell me how to make it disappear without being forced to selection 'allow' which I do not want to do.  I'm not a techie, so please give me as simple instruction as you can.many thanks