I have a Sony BDP-S3200 connected to my WD MyCloud.
MKV and AVI files play OK, but around half of MP4 files won’t work correctly.
They will play, but won’t pause, rewind or fast forward. (Like being at the cinema.)
I get a message on the Sony saying “This action is prohibited at this time”
Sony’s Technical Support are deliberately terrible (after two weeks, they’ve just re-started and are asking again what the problem is).
Has anyone seen this?