This will be an ergonomic study of web product interface (sites), focused on high speed transmission. It assesses the main barriers and difficulties experienced by the users of this type of connection during their interaction with proprietary files (plug- ins). The hypothesis of this study is that excess of plug-ins (no self resources) in these interfaces limits the access to broad band web pages, frustrating users as regards the load and quality expected from the audio and video archives. This research discusses the main stylized facts and the research that has made the present hypermedia possible. Furthermore, it presents a brief history of the computer, CD-ROM, Internet, hypermedia and hypertext. This theoretical reference aims at helping to understand the facts that led to the origins of the Broad Band or Speed Internet, and therefore presents the main technologies used for the Broad Band connection. The first part of this paper discusses the definitions of hypertext, hypermedia and multimedia. Then it establishes an analogy between such definitions and contextualization and the Broad Band site grids and plug-ins found in the archives of such web pages. The study points to two structures which are typical of speed transmission multimedia sites: - Hypermedia pages with hypertext characteristics; - Multimedia hypermedia pages. The second part of the paper discusses the methods, techniques and procedures used in the research (questionnaires with Broad Band Internet users, Focus Group and Cooperative Evaluation) as well as the research outlines. The tests performed aim at collecting data/opinions and knowing the habits of the user population, and also observing the interaction between the collaborators and real Broad Band web sites in relevant tasks. Such tasks have made it possible to visualize the main shortcomings of the users towards the access and consumption of proprietary dynamic files. Finally, the findings achieved through the results analysis of research methods, techniques and procedures lead to some multimedia sites project recommendations focused on high speed transmission. These consider using plugins, sites customization and presenting the contents from the users point of view, targeting the reduction of any constraints or barriers they may experience during their interaction with interfaces and systems.