And here are what I presume to be the settings for the Main Concept AVC/ACC mp4.
Again it was not possible to select 1,000,000 bps in the bit rate menu but it was possible to type it in. I decided to use "Main" instead of "Baseline" but I don't know what they are.

Here is the video (5MB)
http://ds21.cc.yamaguchi-u.ac.jp/~ec...in_concept.mp4 Here soon at YouTube http://www.youtube.com/watch?v=zQA9cYGGJSA
None of them look very different. All look worse than the original avi (28MB)
http://ds21.cc.yamaguchi-u.ac.jp/~econo/temp/043.avi
And, all seem quite a lot worse than the quality of lonleygirl15's videos
http://www.youtube.com/watch?v=ZllfQZCc2_M
or the post introduced at the top of this thread by Irish Mark to the really good quality video of Mr. Safety, here. (the black and white bit at the beginning)
http://www.youtube.com/watch?v=03p3UlvkAT4
Some YouTube videos are really good quality.
Tim