Ok, apparently steam is giving to me error when i try to add you as a friend so...i will give you here the guide of how to unlock these replay achievements.
Just follow this guide, it worked for me: https://web.archive.org/web/20160408231534/http://www.thechrisd.com/blog/2015/06/20/unlocking-tf2-replay-achievements-post-v2-api#_=_