Thanks.
Our Kaltura test installation is an RPM single server based on CentOS 6.6 64bit.
My problem is that the player automatically use m3u8 whan the client is mobile iOS iPhone, and in particular in this case tha player just spins and it's not possible see the video content.
Basically I don't want force the player to use HLS delivery, but it seems the default setting for the video player HTML5 (html5 lib 2.39) and I'm not able to play any other version on iOS iPhone device.
Also, I installed the nginx-vod-module and I configured via kaltura-config-all.sh the same host for vod, api and kmc.
Maybe I have to change the hosts and configure different host for api/vod/kmc ?