V2.14 - Stud.IP 5.1-5.5, Opencast >= 13 Latest

What's Changed

• Avoid PHP Warning "Undefined global variable" by @felix-itz in #997
• Fix possibly invalid player url (#1004) by @dennis531 in #1006
• prevent php-warnings and erros, fixes #1007 by @Davka in #1008
• fix preview images by @tgloeggl

Full Changelog: v2.13...v2.14

Important: After every update of Opencast or this plugin, make sure to go to the Opencast settings in Stud.IP and store them once more to update the settings from Opencast!