If you have created an Overstream of a YouTube video, you can still recover it.
Create an account on dotSUB.com, and upload the YouTube link.
After the video is done uploading, export the subtitles from Overstream and import it.
You made need to make some adjustments, because unlike Overstream, dotSub does not allow overlapping subtitles, and you will have to re-create the subtitles that overlap.
Mark the transcript as complete, and you have a new version of your video.
If you own the video, you can still export the subtitles from dotSUB into YouTube.