Whenever I take a look at the buyer requests I see most buyers request crazily time-consuming and demanding jobs that require a lot of custom design from scratch and hours of work (not to mention years of experience) done for $5, in 24 hours! Do you honestly believe someone who studied graphics for years will actually accept to create a professional explainer / promotion video for you for $5? Or do you honestly expect to get a copyright-free & high quality work for $5? No one, even not a new buyer who needs positive reviews and ratings, will ever do that kind of job for $5. All you will get for such a request is generic offers that have nothing to do with what you need, resulting in only a waste of your time.
Please, be realistic about your request and budget if you want right sellers to be interested in working with you and delivering a quality product.