Actutally...
Hey its kinda good, the graphics and sotry a little sub-par in comparison to what usually airs on television, but you are wrong when you say "a bit of pre-emptive exposure on the internet could do no harm".
I recently went to an interview to a studio which was aiming at finding new talent for a future show of short animated clips to sell to a well known kids network channel.
To make a long story short, after I asked if they would buy clips that had already had exposure on the internet they answered that "once it had exposure, it is too late to be bought". Unless people go crazy over your clip and it is acclaimed as an entertainment breakthrough and/or wins an award, no network will buy it.
If ever you make something really good, dont upload it on the net ! Try contacting a studio, if they like it and recognize it has potential they are likely to either buy it or ask you to make something different but with the same style !
Have a nice day !