I used Fiverr to make an animated explainer video a couple weeks ago with professional voice over. Was only $300 + Fiverr fee for a woman out of Israel. I did the storyboard as no one knows your story better than you. They did the rest within about a week and I had her make two revisions. Easy to work with and did a good job.
If you want actual video, high quality ones around here start about $5K and skyrocket from there. Of course their are lower budget providers, but you get what you pay for.