What's bad about my5 is that the selections are few and also the top quality is 468p.
On the other hand, therokuchannel (dot com) has 1080p for smithsonian and all the same content.
Code:
https://therokuchannel.roku.com/browse/w.ZRvMz6R3mBs8RgwJ74zzcY6v7QoykAc2B0gvz0G4HKvz34e6lWs2Y8YKZwJ3HDx/smithsonian-channel-plus