Videos can be a great way to interact with your audience. It may be that you want to show your customers a new product or service that has come to market or maybe to introduce your team and the premises that you work in. Video is also often used as a training tool. Companies can create videos and tutorials about services or products and upload them to their site or link to them to allow their users to learn in the comfort of their own home or office. Some companies even offer this as a package allowing them to create a number of informative videos and selling them to people who wish to participate in the training. This involves little overheads, once the initial video is created, allowing them to resell it quickly and with little or no ongoing costs.
If you are looking in to video production, then I would advise using a professional company or individual to create them for you as it really can make a massive difference.