Hi there,
As those video resolutions are also 16:9 then when played full-screen you shouldn't see any black bars on a 16:9 display.
If you are seeing black bars then check the video file is in fact this resolution (you can usually do this within the video player). For example I am currently watching a "720p" movie - however the actual resolution is 1280x688, therefore on a 16:9 display it will show with black bars.