Dear Madam/Sir,
As a native French, with a Master degree in French linguistics and didactics, I can offer you my services in transcription of contents, in the subjects you mention for Arte documentaries.
I have an excellent command of French vocabulary, spelling, grammar and structure of the sentences.
It seems the minimum bid I can put for this work is 250 USD. But I could of course do this work for 150 USD, and have it done in 24 hours.
Sincerely,
Gaïd Quéré