getwvkeys.cc is site for generating Widevine keys for decrypting Widewine DRM protected videos.
Does not contain CDM so need your own one to get it working.

Build databases;
python create_databases.py

or manually;
CREATE TABLE "DATABASE" ( "KID" TEXT, "pssh" TEXT, "headers" TEXT, "proxy" TEXT, "time" TEXT, "license" TEXT, "keys" TEXT, PRIMARY KEY("KID") )
CREATE TABLE "CDMS" ( "session_id_type" TEXT DEFAULT 'android', "security_level" INTEGER DEFAULT 3, "client_id_blob_filename" TEXT, "device_private_key" TEXT, "CODE" TEXT )