In (musical) theatre we do it the other way around. The we call it "stage left" and "stage right" or "SL and SR" since we use abbreviations everywhere in our notes. It's always from the "stage manager's perspective" which is traditionally (but not always) facing the audience.
If the stage manager is facing a different way that doesn't affect the meaning of left/right.
It's from their perspective because they are basically the only person who isn't running around like a chook with their head cut off (because their eyes are glued to the script and video screens - https://youtu.be/DP2QOmN57iU?t=82).