A bit of info about the tune: it was composed by Meredith Willson of "The Music Man" fame (76 trombones...). Listen to the chord progression you can hear similarities.
Wow, really wonderful! And I did not know that about Meredith Willson; yes, I see what you mean about the chord progressions, how about that! Really well done!
Quite frankly I try to avoid coming up with arrangements that use one-of-a-kind song specific chord shapes. They are too hard to remember six months down the road unless I write them down (then I promptly lose the sheet of paper) or when in performance. I stick to fairly conventional chord shapes.
Awesome! Thanks a lot! I guess it's not too hard to figure out what you played since your playing is clean and tidy, and the video shows it so clearly. However it'll be almost impossible to play it as relaxed as you do