If you get an error like this

==> Starting build()...
==> Connecting to GIT server....
/var/abs/local/yaourtbuild/get-flash-videos-git/./PKGBUILD: line 28: git: command not found

While installing get-flash-videos from yaourt on Arch Linux, run this command, to install git

sudo pacman -S git

Then try to install get-flash-videos again.