For now, the solution proposed to people who upload videos is to use the "support" button under the video. This button displays a frame in which people who upload videos can display text, images, and links freely. For example, it's possible to put a link to Patreon, Tipeee, Paypal, Liberapay (or any other solution) there. Other examples: put a postal address if you'd like to receive physical thank-you cards, put a logo of your enterprise, a link to support a non-profit organisation...