if you use kaltura-release.noarch.rpm, it will always be the latest released version of kaltura
prerrequisites are:
64 bit RHEL/CentOS 6.n, 7.n or Debian 8/Ubuntu 14.04
PHP 5.3.n, 5.4.n, 5.5.n, 5.6.n [the official distro repo version]
MySQL/MariaDB [the official distro repo version]. Please make sure your MySQL is configured not to enforce strict mode.
JRE 1.7.n