I think it is. Otherwise, every individual who's ever done a tv news interview, for example, would be able to call the shots over what the videographer could do with his footage. Having said that, when me and some of my family were on Family Fortunes (oh yes, Bert's had his 15 minutes....) a few years back we had to sign consent forms allowing Central TV the rights over the footage and that we wouldn't stake a claim from them everytime it was aired etc. Work that one out.