Use Requiem to remove the DRM
Run this and it will strip the DRM from any items in iTunes. However your details will still be in the Metadata.
To remove this from a movie use AtomicParsley from brew with the –metaEnema or -P options
e.g.
AtomicParsley /file.m4v --metaEnema
or another way that remuxes the file and loses all data is to install MP4BOX from Brew, using GPAC package
mp4box -add 'original_DRM_Free_Video.m4v' 'video.m4v'
Both ways will make a temp file with all of the Metadata Striped out
Requiem’s TOR address is
http://tag3ulp55xczs3pn.onion/