For our film I chose two soundtracks. One was Muse - Super Massive Black Hole (karaoke version) and the other was a track used in order to build suspense.
Here is the link to the Karaoke Muse song that we used: http://www.youtube.com/watch?v=Mj-XfDAdqOM
Before I added this song to my film, I thought it would be best if I firstly asked for permission from the YouTuber who uploaded it.
Here you can see where I asked in the comments whether I could or couldn't use this song:
Here is the link for the track we used for our film: https://www.youtube.com/watch?v=9NL4hpgYw5g
Here you can see the comment I added to the YouTube where I asked if I could use their track: