Добавлю, фрагменты конфига nginx


sendfile off;
tcp_nopush on;
tcp_nodelay on;
aio on;
directio 1m;
directio_alignment 4k;
output_buffers 1 2m;
keepalive_timeout 0;

client_header_timeout 20;
client_body_timeout 20;
send_timeout 20s;
resolver_timeout 0;
reset_timedout_connection on;
proxy_buffering off;

open_file_cache max=16000 inactive=20m;
open_file_cache_valid 120m;
open_file_cache_min_uses 2;
open_file_cache_errors on;


В самом хосте...
location ~ \.mp4 {
mp4;
root /farm-video;
}