Malhari

Malhari Full Video Song | Bajirao Mastani
Google coughed up the lyrics, but not the translation, though it did tell me the language was Gujarati. I found another video that has the lyrics and the audio, but not the video. It has just one still image. The translated lyrics are:

(3x) Let the drums beat, let the cymbals ring, let the songs of happiness be played
        Look how badly we have defeated the enemy 

This small flame has erupted into a huge fireball (huge fireball)
The safe of my heart has become filled (with happiness) today
This black night has become rainbow coloured
Look how badly we have defeated the enemy
Our neighbourhood has become greatly decorated
Everyone here is lost in excitement
This victory of ours is so colourful and unique
Look how badly we have defeated the enemy 

(2x) Let the drums beat, let the cymbals ring, let the songs of happiness be played
        Look how badly we have defeated the enemy

So, a victory celebration. I got turned on to this by daily timewaster who posted a modified version of this video that has Donald Trump's face pasted over the lead singer's.

Gujarat

The Gujarati language is spoken in Gujarat, a state in India. Gujarati is spoken by 56 million people which makes it the 6th most widely spoken language in India and the 26th most widely spoken language in the world.