Hard to tell from the video, but it looks like you're rotating the display in order to trigger the flickering. If that's the case, that's a classic sign of a bad LVDS cable (cable that connects the LCD panel to the logic board).
You can replace the LVDS cable alone, but it's kind of a tricky install if you're not comfortable working on your own electronics, and the bezel will look like crap when you get it back on. So you're probably looking at a replacement display assembly.