Add a frontal apache for proxying requests

Is it possible to add another apache to do proxy. For example my kaltura is on and I want to add a proxy to serve url from outside network like

I tried many solutions but it fails.
This example is working but then all the links in the page are not working because they do not contains /streaming/


RewriteRule        ^/streaming/(.*)$$1 [P,L]
ProxyPassMatch ^/streaming/.*$ !
ProxyPass /streaming/
        <Proxy "*">
            Require all granted
<Location "/streaming/">
    ProxyPassReverse ""
    ProxyPreserveHost off

With ProxyPreserveHost on (that I am use to have on others proxy), kaltura is not working.