Basically, media cannot truly be DRM because: (1) it ~has to be converted into data that screens and speakers can display (2) ultimately if it’s fetching widevine encryption keys, those keys are somewhere in your device and can be retrieved
So yes, you can do it. A “capture card” is such a “gyzmo” — but often, you can just rip using software, i.e. record the decoded stream
.aioh