video files

[bally]

ok i know its prob the wrong place to ask but ive had so much help on other matters that i thought i would ask anyway.......whenever i go to a web page that has a video clip to play i click it and nothing happens all i get is this little icon in the top left corner of my screen....the only way i can play the clip is to right click then wait for download before playing...i used to be able to left click it and it would play...can anyone shed any light on this..............anyone?