scammed by natstree for 20m rs2gp

not sure what other proof i can provide, i have .psd of these screenshots in full quality if you think anything is edited.

i offered to go first and traded the 20 mil, then they signed off. he promptly sent me a pm asking to stop
sending email's to the msn he has listed in his profile.
why would i be sending him angry emails when he was
too smart for my alleged scam? it's a crap cover story.
i'm here to stay and have every intention of figuring out
how to make honest trades.

if these screenshots are not evidence enough, how can
i prove that someone is a scammer?
i have the capability of recording video of my desktop,
what would i ask them to say and do?
new here, got scammed twice today fronting/going first.
if i had video and used a MM, would that be enough
to safeguard myself?

thanks in advance for any potential help or advice.





EDIT:

update,
i have recorded a 4 minute video that should help.

it's basically showing that this was not edited,
i scroll through the whole msn chat, show their name is
on my buddy list, and highlight their name which shows
their email address, multiple times.
i have transparent borders and you can see a variety of
content change under them, would be a bitch to fake this.
i intend of proving i'm not ripping people off :]

the video is only 19 megs, and great quality thanks to xvid codec.
i don't want to publicly post the video however, since it
details the transaction. my character name, paypal email etc.
can i send the video to a mod for review?
it's an avi file, i can link it from a private domain direct download.
no zips or any shady bs.

 

Read the stickies and repost please