PC screens and TV screens are different. 16:9 only works properly on widescreen TV. If you record/edit in 16:9 a 'normal' ratio TV will stretch and distort the picture to fit the ratio. As last post suggested by far the best option is to record 4:3. There is nothing to be gained shooting in 16:9 unless you know it will only ever be watched on widescreen.Camera viewfinders also tend to include more than you will see on a TV screen. TV automatically 'masks off' some of the image, to avoid problems with frame edge etc. Computer monitors include the whole frame. Pro cameras include safe area guides to help correct framing, but as a rule of thumb you should aim to frame important elements of the scene pretty close to the middle of the screen.