Go to the "community challenges" area from your Y/RB wheel. On any challenge, you want to click Y to see submitted solutions. From there, press RB/LB to go to the "Hall of Fame" section for that challenge. You'll know you're there because the EA logo crowns the top of the submissions. (If you have the "Happy Thanksgiving!" challenge, do that one.)
Click A to download a clip, but there MUST be a LIGHT BULB (not a cog/gear or tree) in order to get the achievement.
Remember to "favorite" the solution on the way out for another achievement.