Summarize:

Film the star of your show in their natural environment. Try to capture what makes them special or unique. If you're making a show about a group of people, film them all interacting. Make sure you include the main characters or locations of the show. For example, if your show is going to be about a group of employees at a barber shop, go to the barber shop and film them as they work and joke around with each other. Don't worry about using special camera equipment at this stage. You can film with a regular digital video camera, your phone, or a computer. Make the write up short and simple. Tell production companies what format and style your show is and briefly mention the characters and what the storyline will be like. Give them a sense of what a typical episode will be like. For example, you could introduce your write up with something like "I'm envisioning a self-contained format series featuring a psychic couple that travels the country, helping people redecorate their homes along the way. Not only will the couple give their own interior decorating opinions, but also those of the deceased former inhabitants of the home. Each episode will feature a different family and their home." They don't need to be fancy; just clear, straight-on photos that you can attach to your pitch. Production companies will want to know what the characters in your show look like. Write the name of each character on their headshot. You want executives looking at the pitch package to be able to match up their faces with the character descriptions you provide in the write up.
Make a 2-5 minute tape featuring the main elements of your show. Craft a 1-2 page write up about your show. Take headshots of the main characters.