Watch Springs

"The spring is useless in the watch, but reveals a secret when placed correctly"

W H S D E L K W I
I I T D C Y E A N
T M O N A T N T G
H P P O N H G C V
O E P W N E R H E
U R E T O B E S X
T I D I T R E P E
W T A M F O N R S

<spoiler> The spring snaps to the grid. When it does, it crosses through the center of letters which spell out "How Many Waves?"

The answer to the question "how many waves" is the number of loops in the spring: five

Edit: The answer has to do with how many times Loki waves on the video, which is five. </spoiler>