No, you cannot reuse your disneyplus.com/begin code later. The disneyplus.com/begin code is a unique, one-time activation code used when linking your device to your Disney+ account. Once the code is entered correctly and the device is successfully activated, the code expires and cannot be reused. If you need to activate another device or re-login, a new code will be generated. For security reasons, these codes have a short lifespan and are designed to prevent unauthorized access. Always ensure to complete the activation process promptly after receiving your DisneyPlus.com/begin code for seamless streaming.