This video has one little easter eggs, the poem appears in the video have full version:

【Emerging in the brain
Unleash the emotions in my heart
I saw that
Love overflowing lantern
Suddenly
Desire to wait-
being with you
forget you
That day is slow
Long steps in water and clouds

Courage rises in my heart
Crossing the night
together to dawn
Polaris is landing
Polaris falls in the-
in the shadow of the valley
Sunrise clouds
Where are you from?
Where is love?
How can I-
can hold the courage to gaze?

Please courage
It’s also getting better
My heart falls ...
My heart falls into-
the nameless place
Printed into the comet-
that bad luck note
Flower poisonous
When can？
when there is-
lightly put】

Can you find this easter egg? Is hard but very significance. (In the comments, I will post other tips)