Da tube - What old people use to try and look cool instead of just wat

What old people use to try and look cool instead of just watching videos on a thing called YouTube

My grandma tried to be cool by watching 'Da tube' while my dog slept on her lap

My grandpa said 'Da tube' is the best thing since sliced bread

My uncle tried to be cool by saying 'Da tube' and then fell asleep on the couch