That could be your issue then. I would handle it within a self contained blueprint like my example project, so it is not dependent on an game instance, just if the blueprint exists in the current level.
Also, I am not sure how you are implementing a 360 video, but that sounds like something that might require the Ansel plugin or something of the like in order to have it playback correctly.
Since you were able to packaged my project successfully, this does not seem like a bug with the engine, but rather your own setup. You will need to run through your logs and fix your errors. Read the messages as they usually tell you exactly what the issue is and where it can be found.
For example in the logs you just provided:
“LogSavePackage:Warning: Obj in another map: videoMapbkup_C /Game/Maps/videoMapbkup.videoMapbkup:PersistentLevel.videoMapbkup_C_0”
This definitely means it cannot find the video because it is in a different level than the one that is currently loaded and calling the video to play.
Thank you,