With cheaper high-quality cameras, digital non-linear editing systems, and increased competition, you can get a strong video for less than was previously possible. But the cost of solid research, good writing, skilled camera, audio, editing, and design are still high.

Remember that everyone will compare your video with the polish of broadcast television. If it isn't well-informed, moving, or beautiful, it will never hold your audience, much less persuade them or sell them anything.