That will depend on whether or not there is a Roku channel for the stream that you want to watch. If not then you will need something with the correct app or an actual browser. An Android TV box would be the most flexible option. If the stream is available with a Kodi addon then anything that Kodi will run on will work.
I want to view the last concert of the Trag. Hip in August which will be live streamed globally on the CBC (Canadian Broadcasting) website and their YouTube channel. I am in the US and have Fios TV. Best option?