Here's some ideas of music past couples have used for their documentary film.

You would have already chosen some music for certain moments of your wedding day (ie. ceremony entrance, signing song etc), but here are some ideas in any case to help you out for ideas:

Ziggy Alberts – Love me now
Ziggy Alberts – Gone Ziggy
Alerts – Runaway
City and colour – The girl
Defeater – I don’t mind
The Lumineers – Hey ho
Tim Halperin - Forever starts today
The light the heat – Rest of our lives
The temper trap – Sweet disposition
Coldplay – Every teardrop is a waterfall  
Vance joy – Mess is mine
One republic – Feel again
One republic - Good Life
The Icarus account – So in love
The Kooks – Junk of the heart
New radicals – Mother we just can’t get enough

Give me love – Ed Sheeran
Ordinary Love – Ben Rector
Love someone – Jason Mraz
Uptown Funk – Bruno Mars
Sugar – Maroon 5
Bring her to me – Tyrone Wells
Tenerife Sea – Ed Sheeran
Beautiful – Austin Plaine
Suit & Tie – Justin Timberlake
Secret nation - Tonight
Secret nation – Fire
Secret nation – Love you well
Hollow coves - The woods 
Hollow coves - Coastlines
Hollow coves – These memories
Hollow coves – Moments