I saw via Twitter a while ago that YouTube had made it possible to add closed captions (subtitles you can turn on or off) to YouTube videos. This had been something that I'd wanted to do a while ago to our What it means to be a critical student tutorial that I'd blogged about back in September.
You can find the instructions in YouTube's help centre item called Getting Started: Adding / Editing captions, plus additional instructions on Getting Started: Preparing a Transcript File. I decided that I wanted to test out using a transcript file rather than a caption file as this would be much quicker if it worked - and this is what the help article says about it:
YouTube uses experimental speech recognition technology to provide automatic timing for your English transcript. Automatic timing creates a caption file that you can download. Short videos with good sound quality and clear spoken English synchronize best.as per the instructions. The speech recognition software did it's job brilliantly and timed the captions perfectly. The only errors occurred where Steve (the narrator) had deviated from the script. It was an easy job to edit the transcript on paper whilst watching the captions. I then amended the .txt file and uploaded it again. Fantastic and well done Google on making captioning quick and easy!
Here it is - and just click on the CC icon in the bottom right hand corner menu to turn the captions on.