So this is from Napoléon, a 2002 TV show
The soundtrack is by Richard Grégorie: discogs.com/Richard-Gr%C3%A9goire-Napole..
My best guess is that it is Le Sacre (The Crown), since this is a coronation scene.
I found it on this YT channel: youtu.be/FHejp7hj_gQ
If this isn't the right one, they have all the tracks on there, so just look for the right one
Edit: I also don't know which piece of music in that video you are actually looking for, if it's the one at the coronation then yes it is Le Sacre