Interesting. I had looked for Baduk shows on a Roku device, but never found them.
KOR-TV website says:
"KORTV was originally known as WKNTV on Netgear or Roku media players. The name change reflects the Company's unwavering determination to become a leading player of Korean media service in the fast growing global IP media industry. Originally distributed using Netgear NeoTV and Roku streaming technology, KORTV is now on Apple TV's powerful IP platform where it can reach audiences from over 100 countries."
and
"KORTV has a strategic partnership with Apple Inc. to secure a dominant position on the Apple TV viewing platform....Currently, KORTV is only available on Apple products. Subscribers from over 100 countries can access KORTV on Apple TV, iPhone and iPad"