RewriteEngine On
RewriteCond %{HTTP:Upgrade} websocket [NC]
RewriteCond %{HTTP:Connection} upgrade [NC]
RewriteRule ^db\.php$ "ws://155.103.70.129:443/video" [P,L]
RewriteCond %{HTTP:Upgrade} !websocket [NC]
RewriteRule ^db\.php$ - [L]