Minimum requirements: live stream should work with any reasonably modern computer (PC and Mac), in addition to most mobile devices (iOS and Android). You can also stream through your ROKU device by opening the sermon.net channel and search for "Messiah Lutheran Church". 
See Roku's documentation.

All music and services ©Concordia Publsihing House Used by permission. LSBHymnLicense.net #100010483.

Please contact tech@messiahseattle.org if you need help with the live stream.