Hey MErbrich,
As mentioned, there is an option within your Media Source file that allows you precache your media files into memory if applicable.
I created a template project for Media playback which you can download and mess around with to get an idea of how to call media files to open. There are other ways to put checks in place to make sure your video has been loaded first, like using the OnMediaOpened bind event which won’t fire until the media has fully loaded into memory.
[Media Player Template Project][2]
Let me know if you have additional questions.
Thanks,