Hi Richard, the type of video you needreally depends on your objective.
Here at Noble Digital
we do customer acquisition, and this video
we did for a Sharktank company (you probably recognize) has been getting them new user signups consistently for 15 months straight and still going strong. This is a top funnel video designed to bring you traffic. (the video has paid for itself several times over. So cost is irrelevant here)
But Im sorry Fivver videos are not going to move the needle for a seed startup.
Meanwhile, once people do come to your site, they're ready to learn more and an explanation video,
can help clarify your product/service and shorten the sales cycle and engagement time on your site. This is mid-funnel video.