Concordia Seminary - St. Louis posted this video of a recent chapel service at its facebook page on October 15.

The song being played by the band is "Forever" by Chris Tomlin. I'm not familiar with it, so I looked up the lyrics (below).

According to Wikipedia, Chris Tomlin is a " worship leader" at "Passion City Church."   Passion City Church doesn't list any confessional affiliation or doctrinal stance other than this single statement about what they believe about baptism:

"Baptism itself does not make us a believer in Christ, but rather a way of saying to the world that our relationship with Jesus, and our faith in Him, has already begun. Baptism symbolizes that our old self is gone (going under the water) and our new self has come (coming above the water) and that we have been made alive in Christ."  

There is a video archive of the church's sermons.

But back to " Forever," here are the lyrics, which some consider a paraphrase of Psalm 136:

" Forever" by Chris Tomlin

Give thanks to the Lord
Our God and King
His love endures forever

For He is good
He is above all things
His love endures forever

Sing praise, sing praise
With a mighty hand and outstretched arm
His love endures forever

For the life
That's been reborn
His love endures forever

Sing praise, sing praise
Sing praise, sing praise
Yeah

Forever, God is faithful
Forever, God is strong
Forever, God is with us
Forever, forever

From the rising
To the setting sun
His love endures forever

And by the grace of God
We will carry on
His love endures forever

Sing praise, sing praise
Sing praise, sing praise
Yeah

Forever, God is faithful
Forever, God is strong
Forever, God is with us
Forever, forever

Forever, God is faithful
Forever, God is strong
Forever, God is with us
Forever, forever, forever

His love endures forever
His love endures forever
His love endures forever
Forever

Sing praise, sing praise
Sing praise, sing praise
Yeah

Forever you are faithful
Forever you are strong
Forever you are with us
Forever and ever and ever, yeah

Forever you are faithful
Forever you are strong
Forever you are with us
Forever, forever

You are our God
You are God
Forever and ever and ever

And ever and ever
And ever and ever
And ever