Почему не работает кеширование nginx?

proxy_cache_path /var/www/{адрес сайта скрыл}/public_html/video/ssd_cache/cached levels=1:2 keys_zone=ssd_cache:100m inactive=120m max$
proxy_cache_min_uses 1;
proxy_cache_key "$uri";

server {
listen 81 ssl;#
root /var/www/{адрес сайта скрыл}/public_html/;
ssl on;
ssl_certificate /etc/sertificate/ssl.pem;
ssl_certificate_key /etc/sertificate/ssl.key;
ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
ssl_ciphers "HIGH:!RC4:!aNULL:!MD5:!kEDH";
add_header Strict-Transport-Security 'max-age=604800';
ssl_session_cache shared:SSL:10m; # holds approx 4000 sessions
ssl_session_timeout 1h; # 1 hour during which sessions can be re-used.
reset_timedout_connection on;

location ~* ^\.mp4$ {

expires max;
proxy_redirect off;
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_cache ssd_cache;
proxy_cache_key "$request_method|$http_if_modified_since|$http_if_none_match|$host|$request_uri";
proxy_cache_valid any 12h;
proxy_ignore_headers Set-Cookie;
proxy_buffering on;
proxy_ignore_headers Expires;
proxy_ignore_headers X-Accel-Expires;
proxy_ignore_headers Cache-Control;
proxy_ignore_headers Set-Cookie;
proxy_hide_header X-Accel-Expires;
proxy_hide_header Expires;
proxy_hide_header Cache-Control;
proxy_hide_header Pragma;

proxy_pass https://127.0.0.1:443/$uri;
error_log /var/log/nginx/access_proxy.log;

}

}

server{

# limit_req zone=hostreqlimit burst=2500 nodelay;

# listen 80;
listen *:443 ssl;
server_name {удалил адрес сайта};
root /var/www/{удалил адрес сайта}/public_html/;
index index.php;

location = /stat9526231649 {
stub_status on;
access_log off;
allow all;
}

location ~* /video/video_disk_([1-8])/(.*).mp4$ {
root /var/www/kinogo/public_html/video/;
open_file_cache max=200000 inactive=12h;
open_file_cache_valid 12h;
open_file_cache_min_uses 2;
open_file_cache_errors on;
expires 12h;
try_files $uri $uri/ =404;

mp4;
mp4_buffer_size 2M; #2
mp4_max_buffer_size 6M; #4
access_log off;
# expires max;
#limit_speed one 10204k;
#limit_conn addr 6;
#aio on;
#aio threads=default;
aio threads;
directio 512; #512
output_buffers 5 6m; #1m
sendfile on;
sendfile_max_chunk 256k;
tcp_nopush on;
tcp_nodelay on;
gzip off;
gzip_static off;
#add_header Cache-Control public;


#include sites-available/bansite.local;

}