I have created numerous educational videos, sales videos and hosted hundreds of webinars. I would recommend checking out the National Speakers Association, of which I am a member, at NSASpeaker.org.
If you are on a shoestring budget, you could try fiverr.com - but approach cautiously as it is mostly amateur talent.
If you would like to discuss this further, or get some personal referrals, give me a call. I offer a free, 30 minute call to first time clients. Use the link below.