[Sony Vegas 11 Pro] Worse quality after Youtube upload

[bowieee]

What's up guys,

My problem is the following...
When I render my AMV and watch it locally there's no problem whatsoever. All scenes run smoothly as they should be.
When watching after uploaded on Youtube however, there's specifically one scenes using fast cuts that goes haywire quality-wise.

Here's what it looks it: http://puu.sh/hqiXr/61bd672202.jpg
The weird thing is that it's only one black and white scene as far as I know.

Here are my render/project settings:
http://gyazo.com/c5f9e2b08e03ec2702aaef3d95baa3f6
http://gyazo.com/4eeabca3cdf619802673644c71c94372

Part of the original material might be 24 fps footage.

I just don't understand where the problem is coming from. It must be Youtube's inability to work with my codec or ways of encoding right?

Anyway, thanks in advance for any help!

[l33tmeatwad]

That is on YouTube's end, there's not a lot you can do a about it.

[bowieee]

Welp, that's quite irritating then! :c
I expected this to be some kind "common" beginners problem...

[Mol]

Dont use vegas for compressing? Also can try to throw them a lossless version, don't think there's file size limit .