Don’t overwhelm your audience. Remove everything from your images and videos that doesn’t add any useful information. Leave out the visual “noise.” Each object, line, and pixel that you can omit adds to simplicity and thus to clarity.
The simpler your image or video is, the better users can focus on its content.
Another advantage of simplified images and videos is that they can better be used for documenting multiple product versions.
Keeping images and videos simple doesn’t mean that they shouldn’t be visually appealing. Aesthetics is an important factor in motivating users, and it’s an important factor for the perceived quality of your documentation. However, a good image or video doesn’t always have to be elaborately created and show every detail. The aesthetics of a good image in technical documentation basically lies in conveying the necessary information as simply and quickly as possible.