@xmountainx Depending on your objectives, you can go anywhere from Fiverr to a company that specifically makes these types of videos for SaaS companies.
If you're just getting going, cheap is the way to go - however, there's something to be said about quality that you don't get with 'cheap'. If you're in a good seed round or series A, it's likely the time you're now thinking of your SaaS product in a more brand-centric way. Here, is where you'll actually want this content to be good, tested, and flexible.
We're the primary vendor for Google Area120 companies and a handful of other startups for hero/explainers and demos (part of our package), but we're not cheap. What we have done is package up a suite of the 'traction-centric' videos most SaaS / emerging tech companies need - focusing around the hero/explainer.
Happy to provide feedback on videos and tips, whatever - here to help!