You can see the ebuild here: https://gpo.zugaina.org/AJAX/Ebuild/16344427/View I can't download a binary from the SRC_URI's address. The correct server for AMD64 should be the following: http://time4popcorn.se/Popcorn-Time-0.3.7.1-Linux64.tar.xz Either trying manually (mozilla,wget), either trying via an ebuild on local overlay, it can be downloaded and installed. With this server I have a working popcorntime binary.
upd ebuild in overlay. enjoy