I am attempting to use bis_fnc_customGPSvideo in a trigger as

"_script = ["\video.ogv",1] call BIS_fnc_customGPSvideo;"

However, every attempt at the script running, I am prompted with

"RSC Layer name cannot be empty string"

and the script does not run.

I have tried several tweaks to the code, such as "spawn" instead of "call", but to no avail and the same result. Following the wiki or related forum posts are no help here.