When you need to provide a webcast you could use a virtual background that looks familiar to your audience. For example if there is specific location in the office that is used for giving presentations (training room, auditorium, meeting room, etc.) you may seek to get a picture of that location.
Use this picture as a virtual background, so your audience can see something that looks familiar to them for other presentation. Do make sure that the perspectives of the picture are such that it can be properly used for using as a virtual background.