If you've ever had an awesome performance and no one from your band or family was there to record it, all may not be lost.
If there was someone there recording this social media miracle and they posted it on Facebook, you can use this hack to grab it.
You'll need to do some CSI-style investigating to find it, but when you do, it'll be worth it.
NOTE: It'll be very difficult to find the video if they haven't tagged you or your band. Ask people at your shows to tag your band page and encourage them to record.