Alas, I didn't. I had to come up with a slightly convoluted work-around - I only wanted the videos to play audio, (not video), so I have put in my own audio tracks and set the page to move on after a certain length of time so that participants can't listen twice.
Already have an account? Login
Enter your E-mail address. We'll send you an e-mail with instructions to reset your password.
Sorry, we're still checking this file's contents to make sure it's safe to download. Please try again in a few minutes.
Sorry, our virus scanner detected that this file isn't safe to download.