While this should work against unsophisticated users, the "analog hole" cannot be really plugged: the user has to see or hear the protected content. At that moment, the content may be grabbed (in a bit-perfect way, with some luck).
So, this can curb sharing but not really prevent it. Will it be a net positive? Let's see.
in general even if decent copies are easy drm can be effective: not in preventing copies but in making paying users feel they got their worth.
I am generally of the opinion that piracy is a net positive, but I am ok with pirated content being slightly degraded, analog copies often meet this criteria
So, this can curb sharing but not really prevent it. Will it be a net positive? Let's see.