Good news: Even actresses who are excellent now were awful when they were teens.
If you're worried about anyone ever finding that VHS of your cringe-inducing role in your high school's production of Kiss Me Kate, you can always console yourself with the fact that everyone had to start somewhere. Even Katniss Everdeen got her start with a shaky monologue from Shakespeare's Othello. And her singing at 14? Not nearly as good as the singing she just did in Mockingjay.
(Of course, there probably wasn't an audio editing program on this camcorder. There certainly wasn't on my parents'. Nor was there a setting that allowed the camera to completely filter out the comments they made during the performance such as "His shirt is too tight" or "Let's skip the McDonald's after.")
One question, though: What is that accent J-Law is doing? Is it English or some kind of alien language not perceptible to adult ears? I'm having a really hard time figuring it out. But the energy, the energy is amazing. (Could someone edit this video to include that scene from Mockingjay where everyone is talking about Katniss being their star?)