I did some looking and Haier is an electronics manufacturer with many products, including some that can stream video to a TV. If you could tell us which model device you have someone may be better able to help.
From reading the description on the website, the video out to your TV is through an HDMI cable. Have you tried using another cable to see if that's what's causing your problem?
One more question, are these videos downloaded to your iPad or are you streaming them from somewhere? If so, maybe there isn't enough bandwidth to properly stream the videos.