No. All the downloaded data will be stored in the internal storage of the devices. External storage cannot be used as storage.
Yes. You can store not only internal storage but also external storage such as an SD card. To switch the download target, please refer to the following steps:
1. Open the Hulu app.
2. Select "Gear Icon" from the Home menu.
3. Select "Application Settings."
4. Select Internal storage or SD Card.
The default setting is "Internal storage."