I must confess I'm running out of ideas here. There doesn't seem to be anything wrong with your video.
4:3 is a very common aspect ratio. The width/height values are even. If either of them were uneven (such as something like 960x721), Youtube would most certainly reject it. Plus, 60.000fps is very standard and a whole number. If your frame rate was decimal (example: 59.998fps), youtube would probably have problems with it as well. Finally, your Bit rate mode is constant, not variable (Youtube seems to have trouble with the latter).
So... if converting the video to .mp4 could not help solving the issue, I don't know what else to suggest. BUT, I've never worked with xtor as my Codec ID before, so maybe youtube is failing to handle it. Even though you converted to a different Codec ID already, maybe the original one is still interfering somehow.
Maybe you could try to record your video with a program other than Dxtory? I dunno.