Lets just say "yes".
This game is an emotional experience, worthy of playing through, not just watching.

It offers a well put-together story (that uses body language and imagery to help you understand the non-existant language spoken throughout), a beautiful soundtrack (that emphasizes the massive spaces the brothers traverse), and a straight-forward control system (that is easy for casual players to grasp while still being interesting for less-casual players).

All of this in a perfectly stylized world that simply amazes, with plenty of chances to stop and view the majestic, undating atmosphere.

Do yourself a favor: Get the game.
Do not watch a playthrough.