Using Audio/Video Transcriptions For SEO

I've tried to explain this as short and sweet as possible. Thanks for reading.

I've recently started having our videos transcribed and keyworded. The videos are hosted on youtube and already embedded on our website. Each embedded video is accompanied by an existing keyword-rich article that covers the same content of the video, but in a little more detail.

I'm now going back and having them transcribed. The reason I started doing this was to essentially lengthen the article and get more keywords on the page.

Question A. My concern is that the transcription covers the same content as the article, so doesn't add that much for the reader.

That's why when I post the transcription (below the embedded video), I use a little javascript link for people to click if they want to read it. Then it becomes visible. Otherwise it's not visible.

Note that I am NOT hiding it from google by doing this - and it will still show up for people who don't have javascript on - so I'm not trying to cheat google at all and I think I'm doing it based on how they want it done. Example: http://www.healthyeatingstartshere.c...-plan-mistakes

So my first question is: do you think the javascript method is a good way of doing it?

Question B. Does anyone have any insight on whether it would be better to put the transcription:
1. On the same page as the embedded video/article (which I am doing now), or
2. On a different page, linked to from the above page, or
3. On various other websites (wordpress, blogspot, web2.0 sites) that link back to the video/article on our site.

Basically, I'm wondering from an SEO point of view if I'm wasting a 500 word transcription by posting it on the same page as a 500 article that covers the same topic and uses the same keywords, and I wonder if it would be better to use the transcription elsewhere. Do you have any thoughts on which of the above methods would be best?

Thanks so much for reading and any advice you may have.