Whatever demo you decide to produce, you personally need to be responsible for as much of the material as possible. This goes for production people as well as performers. Once you’re out in the working world, others will be involved in a television or large radio production. However, if you’re an aspiring television or radio anchor/reporter, you should shoot/record all interviews and footage as well as script and edit any packages yourself. That goes for the editing of the actual demo reel as well. News directors might ask you if you indeed did the shooting, scripting and editing yourself because you will probably have to perform the same duties if you get the job.