hello,
it´s great there is willingness to look into this by DT!
– and I would second this also – for several reasons (of different nature 
) :
one, is because I also have practical demand here.
two out of principal reasons I have given elsewhere
three is, that I just found that my vimeo pro account also allows for automatic captioning; which also shows where the train is running to in terms of information work with video and it´s possibilities.
would be really, really awesome if one could tap into this universe of augmented information, which already exists in text-form.