Which is more promising, camera or photography?

Photography is much simpler than photography in both the early and late stages. If you shoot a video, you should have a basis for editing and directing. Because it is dynamic, you should understand the whole process before shooting a material. Later special effects are much more difficult than still photos, and of course you have to earn a lot of money. So it's up to you. If you can, you can learn photography first and then learn photography. The two are interlinked in many places.