Usually, the demographic targets of media information are people who are always on the go, and have limited to no time to view certain informations to them.
Text-heavy media information will not work because they have limited time to read, process and understand given information. While audio can be considered a good alternative, not all people have ready access to its source, and people will likely rather listen to their favorite music than to listen to informational audio.
In visual, it can be accessed and retained easily by people because most of us are considered visual learners. It is also more accessible, given the widespread use of social media which also relies heavily on visual presentation.
I prefer video in media information.
The reason is because, when the information is in a video form, you can understand it more. It is better than text because you still need to visualize it. It is better than audio because you still need to understand what is the speaker talking about, especially if the audio is not that clear. Lastly, it is better than visual because you still need to interpret the picture. If the media information is in a video form, it is like the combination of all those 3 ; text, audio, and visual.