I uploaded my video to YouTube and the highest available playback resolution is 360p. This is much lower than what I uploaded. I believe that YouTube isn't making higher resolutions available for my video because of its aspect ratio. The video is 720x400.
How can I convert my video to a different aspect ratio without losing any of the picture or picture quality? I don't care if blank space appears around the video so long as the picture doesn't get stretched horizontally or vertically.