Hey, sign me up for that sound editing contest
While I'm not an industry professional or anything, I can definitely mix multiple tracks of sound and/or music into a video and have a wide variety of tools to do so.
If you need a reference of my work, I don't have any video-related evidence but I do mix and master songs written by myself and others. If you actually listen to that, the section between 1:10-1:45ish is the best example of my mixing.
It would be nice to test the skills I acquired in my Audio Production classes in college. I have yet to come across an opportunity to use them that I can actually enjoy, and even just being the backup sound guy would be awesome.
And just maybe if I end up doing this, I'll feel a little less like I wasted a fuckton of money.
Because I did.