I completely understand the kind of explainer video you are talking about. I wish to tell you that producing this video within a week will not be a hassle for me. I'd really appreciate it if you could take out the time to take a look at my portfolio on Freelancer, so you can get a better picture of the what I am capable of.
I'm currently based in New Delhi. I've studied Practical Filmmaking from Met Film School, London and have worked on tons of short films, three television commercials and one feature film for Bollywood.
To complete your project, I'd need some details about your organisation, and if possible, have a face to face discussion with you to understand your exact needs and why you are wanting to create this video. Once I'm through with that, I'll start working on your explainer. You need not worry about the voice over, I have voice over artists from US and India, so it should not be a problem at all.
I'd like to discuss this further with you and hope this works out for the best of both of us.
Regards!
Leo Shastri