Best way to change kaltura 11.2.0 using http to use https

In regards to:

You are right, will be fixed and thanks.

As for the Apache Vhost configuration, just stating the port to be 443 does not make it work over SSL, what makes it work over SSL is setting:

SSLEngine on

The template for that is here:
/opt/kaltura/app/configurations/apache/kaltura.ssl.conf.template
Upon selecting SSL during kaltura-front's /opt/kaltura/app/configurations/apache/kaltura.ssl.conf is generated by replacing the tokens in the template with the actual values, and a symlink is created under /etc/apache2/sites-available:

zzzkaltura.ssl.conf -> /opt/kaltura/app/configurations/apache/kaltura.ssl.conf

and then, a2ensite zzzkaltura.ssl.conf is called, which creates:

/etc/apache2/sites-enabled/zzzkaltura.conf

You can see the code for that here: /var/lib/dpkg/info/kaltura-front.postinst

The difference between:

<VirtualHost streaming.example.fr:443>

and:

<VirtualHost *:443>

Is that the first will only affect requests to streaming.example.fr:443 and the other will affect ALL requests made to this server over port 443.
Both are valid but we try to not affect other operations or functions they server may be performing, hence, we only apply the configuration for the domain you've input during the post config phase.