The data that makes up the movie is actual physical stuff that can be measured and is arrange in a specific way. It doesn't disappear when you stop looking at it. It is also stored on a physical object, harddrive, CD, whatever.
Exactly the same as an old physical book. The data is the lines of ink. The book's pages is the object it is stored on.
You can make more of it or destroy it in exactly the same way. Copying more of the data onto more of the storage device/object. Or throwing it in the bin/deleting it.
In common parlance we refer to old media as physical or new formats as digital. This is where you got confused. It is either physical or digital, Not physical or abstract. Which means something completely different.