I was watching a video produced by local movie maker, on 13" MacBook and it has lines! not sure why. I was thinking maybe the movie has rendered badly. How do I find out what's the resolution and frame rate.
The lines may come from the fact that you have exported the video with interlacing. You should generally avoid interlacing for any digital end-user medium.
To find out about certain technical aspects of a video, the program MediaInfo is a very handy tool that can tell you a lot about the specs of your video, including basics like video resolution and framerate. Though it's very unlikely that the root of your issue is the framerate or resolution. Medianinfo can also tell you if a video is using interlacing which is more likely the cause.