Good day,
I am a full time freelancer, mainly focussing on audio transcription. I have done video transcription as well, and would be happy to provide you with examples of what I have done, however, my rating and customer feedback on Freelancer would be a good indication as to what service level you can expect.
As per the video that I've seen, the audio is quite clear, so I would be able to do an hour sound in roughly six hours. I normally charge $50 per audio hour, however, since this is a bigger project I would be happy to lower my rate to $40 per audio hour.
Please feel free to contact me, to discuss further detail.