The conductor shot was cropped to lose the air on each side and then scaled and moved using the fixed Motion effects, Basic 3d effect and drop shadow added.
Your values will be different as I was working with your screen shot still, you will be working with the full video. This was put on track 3
The choir shot was similar but the 3d effect was rotated the other way, no cropping required.
This was put on track 2.
The background was made in the title designer. A rectangle shape was made with a 4 point gradient fill. The eye dropper was used to choose the colour of each corner, I picked a colour from the video nearest each corner.
This was put on track 1