Under daily task watch a video wont play it says cannot play as why????

Daily task? I've been a member since 2013 and I have never heard of Daily Task.

I've got ya beat by 6 years Rosie and I've never heard of Daily Task.

It is a function that show when you click on your profile strength (not sure if this is only on the mobile app or not) it allows you to increase how popular your profile is by completing certain tasks, like watching a short video ad, messaging other users, completing more details in your profile amongst other things.
if you cannot see the videos (which normally open I an external browser I think) then this may be a problem with settings on your phone/computer rather than the Mingle2 app.
hope this helps