```
$ sudo systemctl stop nginx
+$ sudo vim /etc/nginx/sites-available/peertube # Comment ssl_certificate and ssl_certificate_key lines
$ sudo certbot --authenticator standalone --installer nginx --post-hook "systemctl start nginx"
+$ sudo vim /etc/nginx/sites-available/peertube # Uncomment ssl_certificate and ssl_certificate_key lines
+$ sudo systemctl reload nginx
```
Remember your certificate will expire in 90 days, and thus needs renewal.