A first video illustrating the general radiotherapy process is already available. This video will be used as a 'test video' to be shown to patients undergoing radiotherapy in one of the 4 participating centers. Questionnaires will evaluate the quality and the impact of the video and will assess the need for additional information. Moreover, 25 patients will be invited to participate in 5 focus groups, each focus group concentrating on one of the 5 most frequent tumor groups (breast tumors, lung tumors, head and neck tumors, urological tumors and gastro-intestinal tumors). The information gathered from the questionnaires and focus groups will be used to determine the content and format of the next videos. In total, about 10 videos on specific parts of the radiotherapy process will be produced.
