Facebook’s users reply with sticker and text for comments in usual but now Facebook has also added video support to it. This feature of Video Comment is here and currently for desktop users.
Android and iOS users have to wait for this feature. In order to upload video via comment, users have to click on camera Icon.
The users, however, cannot post video comments on all kinds of posts. As per Facebook’s product engineer, users can post video comments on Pages, Groups and Events.