Thanks again to tjinda28 for uploading this vids on her YT channel and to candy for the tip.
Just in case you've forgotten what he said here's translation once again.
Young Saeng~
I want to tell you my dearest friend.
Will only remember the sadness as compared to happiness~
However, I wil think of you when that happened.
We can feel the love you give
so that we can stand up and strive again.
And now we are,
we are connected together with our hearts
We can be together forever
Together, tonight, in this blissful night,
in this very moment, let our meeting become a precious memory
I love you~~~