From their website
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http://www.hrtv.com/faq/#465
Is HRTV available on the Roku service?
HRTV.com is in development to offer the HRTV.com service on Roku. Stand by for an announcement.
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Does the live stream work on an iPad?
Yes, you can watch both the live stream and any of over 7,000 video on demand horse sports videos on HRTV.com on your iPad without any additional app. Just log onto HRTV.com on your iPad otr tablet just as you would on your PC or MAC.
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