Here is a short introduction I created specifying how my course introduction met the Standard 1 requirements.
Here is the link to the course introduction I created in ScreencastoMatic and uploaded to YouTube. https://www.youtube.com/watch?v=VF30YOIuJXI. Once the course was in YouTube I used the Video Manager button to get to the Edit functions for the video. From there I chose Captions, and then +Add a new track. I uploaded the transcript I had been reading from when I created the video, being sure to upload the plain text (.txt) file I had created from the parent Word document.
This gave me two transcripts once the .txt document uploaded; the one I created and the automatic captions one, so I clicked on the automatic one and chose to disable it under Actions. This left only the file I uploaded as the Closed Caption file that would be used.
Going back to my original video, there are two CC buttons that appear for the video. The one embedded in the black video control panel immediately under the video is the one I used to turn on the captions. If you click the white CC button below that, you will be taken back to your CC controls for the whole video (where you can upload, disable, etc.)
I hope that helps! I learned all this by attending a seminar on accessibility at one of the Digital Union’s technology days. I didn’t win the free iPad, but I did learn some valuable ways to use YouTube for accessibility. 🙂