PC leaves footprints when rendering videos ?

Ok guys, here I need a little help finding what could cause the videos created by me (my PC) to be deleted from youtube.

At the beginning of this month I made a MVB campaign, added 10 old (3-4 month) youtube accounts which already had a few vids + around 1000 videos dlded from youtube + ~200 vids created by me with Camtasia or Video Spin Blaster. So, I've uploaded around 120 vids/account.
After 2 days, all the accounts that had videos created by me were deleted and the ones that had only videos downloaded from youtube are up and fine even today (after 2 weeks).

My question is:
Is it possible that my PC leaves some footprints when renders videos because 90% of the videos I create are deleted after 2-3 days and videos that I dld & reup stick with no problem.

Any ideas ?

Did you use 1 private proxy per account? It could also be the link in the description, which may be blacklisted by youtube.

They are eveen known to ban people with same tags, so try to make every video uniqe