Nowadays a lot of videos are made about different topics. There are many web sites on which free videos are available like YouTube, Daily Motion etc. It is decided by the people, which videos to be made, because the creators of the videos make what the audiences want to watch. The videos might be used for official purposes, advertisements, entertainment, etc.
TV broadcast and marketing videos:
The people doing business related to corporate video production meet different kinds of clients who want different types of videos to be created. For example, some videos are broadcasted on the television for the advertisement of a product. The commercials that are seen while watching a television show are all the videos that are made and shown to people to increase the market value of a product. When people watch the advertisement videos, they go to buy the product if they find it attractive. So the sale is increased.
Event videos and training videos:
When different events are organized, they are to be captured by the camera, so that it can be watched later or may be shown to those who missed it. So event videos at Righteous Films are very commonly produced these days and people hire the best video makers that they can afford. The events include wedding ceremonies, some business party or any event like this. Training videos are those in which the tips for the new comers in a field are provided and the work is demonstrated in a video, rather than one or more person trains them actually. This can save both money and time. Instead of training again and again, each time a new person joins a company, a video is made just once and every new comer watches it to get trained. Modifications are made if required with the passage of time.
Other types of videos can be:

Animations: Animations are basically cartoonish videos in which a theme or a concept about a particular thing is given. It is computer generated and no real actors and cameras are required for this.
Distance learning videos: Nowadays, distance learning is getting so popular. People can study while staying at their home. They just need to get admission in an educational institution and then they can study while staying home. The lectures are delivered to them through videos. So distance learning videos play a great role these days.
There are videos in which tutorials about different languages are given. People can learn different languages that they want to learn by watching these videos.
Some companies make use of videos for their promotion among the people by showing their good work and capabilities.

All of the videos are made keeping the requirements under consideration.