security - What I need to know to do asp.net streaming -

i have thing create internet shop sell video views. , there rules, don't know how do. rules is:

loggined client can view 1 video 3 times per day. read somewhere need generate virtual links video , server must hold it, example, 3 hours or until client looked end video, , delete virtual link , refresh player state "start video position , waiting start". on youtube client shouldn't have way rewind video.

i need hold situation client buy 'video01' give client him page address or attributes data player tag. if second client don't buy 'video01' shouldn't load it. (i think it's can solved cookies).

after 180 video views, client's subscription must stopped.

and question me how play video website? can explain me how make asp.net site rules wrote above? technology need use? grateful if advise me literature need read know how this? perhaps start need know how play video on asp.net webpages. free flash player should use solution, examples please? need help.

p.s.: need use free flash player play videos, not silverlight. videos on remote servers, not on local server hold site.

to limit video per requirement need use generichandlers in asp.net. must designed in such way url must expire after reaching above condition.

for example, can generate random key should append url (ie, querystring) , store in database along time of generation. can make key expire after 3 hours then.

to play video on website can add jquery plugin videojs. documentation add simple html5+flash video player.