iPhone 6 Plus vertical lines

Just elaborating the video, when I put some pressure on the top right corner of the phone, the lines disappear but will reappear. This can also happen when pressure is put on top left corner of the phone at different intensity. Lines return either gradually within seconds up to within minutes. When the lines are present, all touch screen is working. When I make the lines disappear, the right side of the screen stopped working but left one works OK. When I send phone to sleep and wake it up, all touch screen works again irrespective of whether there are lines or not, and after a while any of the above problems can happen again. Sometimes, when I make the lines appear and disappear intermittently, some parts of the screen are activated without me tapping or touching the screen.