It turns out there are a couple of important parts here.
One is the “Featured Video Plus” Plugin to nest your video up in the area normally reserved for Featured Images, which gives it a nice, static, and dependable placement.
Another is Squelch Tabs and Accordions or a similar AJAX-powered tabbing plugin, which enables multi-page data to be contained on a single, non-refreshing section of a WP Post or Page.
Finally, for the submissions, an AJAX-powered Contact Form (there are many) is key.
Using these in concert enables a single WP Page (or Post) that contains a playable video and then has tabs of useful information, submittable forms, and downloadable data (using the standard Media Gallery in WP or one of your own choosing).