You don't even need video for this: I once worked for a company that put a carousel with everything in the product line, and every element was just pointing to the high resolution photography assets: The one that maybe would be useful for full page print media ads. 6000x4000 pngs. It worked fine in the office, they said. Add another nice background that size, a few more to have on the sides as you scroll down...

I was asked to look at the site when it was already live, and some VP of the parent company decided to visit the site from their phone at home.