Comments allow us to create interaction between users. In a timeline, we can analyze how a conversation has developed and participate in it. Including these kinds of interactions will give credibility to a product or a video, capturing the attention of users and inviting them to interact with the platform.

If you want to capture your user's attention, include an image of the person that is doing the comment. People remember images better than words, it is called the Picture Superiority Effect (https://en.wikipedia.org/wiki/Picture_superiority_effect), and they are especially appealing to us if they are images of other people.