To play a protected M4V file, the computer needs to be authorized (using iTunes) with the account that was used to purchase the video.
ໄປຫຼິ້ນໄຟລ໌ M4V ປ້ອງກັນ, ຄອມພິວເຕີຕ້ອງການທີ່ຈະໄດ້ຮັບການອະນຸຍາດ (ການນໍາໃຊ້ iTunes) ກັບບັນຊີທີ່ໄດ້ນໍາໃຊ້ເພື່ອຊື້ວິດີໂອ.