Thanks for reaching out.
At this time, offline viewing is not available on our apps and site. However, we understand that this would be a well-received feature and we'll do our best to implement it in the future.
In the meantime, you can continue to watch videos on Viki.com as well as mobile apps and TV apps.
We're always looking to improve the community's experience at Viki, and your request for this feature has been valuable in providing us with insight on what you need and would like to see in your drama viewing experience.
If you have any additional questions or concerns about anything, please let me know!
Viki Community Team Member