How to play Old Hundredth in 12 different keys?

Old Hundredth tune is sung in many countries and in many languages. Therefore, it's not surprising that this lovely hymn is one of the most popular melodies sung in churches today. Surely every organist knows how to play it in G major or F major (the keys in which this hymn is the most easiest to sing for people). But have you tried to play it in 12 different major keys?

In this video, I demonstrate how this hymn harmonization sounds in all major keys. This could be a great exercise in hymn transposition which you might enjoy playing yourself.