RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond ${REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !-l
RewriteCond %{REQUEST_URI} ^/video/(.*)$
RewriteRule ^(.*)$ /video/index.php [L]

RewriteRule ^video/(.+)/(.+)/(.+)$ /video/$3 [L]

RewriteRule ^video(.*) /video/index.php [QSA,L]