OVER 40 videos produced or directed by local tertiary students will be shown next month at the Joint Colleges Video Festival '93. The festival, the first of its kind, costs over $17,000 and draws on the talent of seven local tertiary institutes. These are the University of Hong Kong (HKU), Hong Kong University of Science and Technology, Chinese University, Baptist College, City Polytechnic, Chu Hai College and Hong Kong Academy for Performing Arts (APA). Videos of various types, including documentary, drama, music, advertisement and news as well as experimental pieces that are not so easily classified, will be shown. Some of the videos are outstanding projects completed by students over the past year, while others were specially produced for the festival. Most of them are short, ranging from one to 15 minutes. Purple Lee Chi-yan, chairman of the organising committee, said the festival took them almost a year to prepare. ''The broadcasting media is very popular today. It's the most effective way to spread messages. Even in colleges, we are not limited to magazines, newspapers and posters. Many colleges have their own TV crews. ''However we don't have the chance to share our experiences and not many students are aware of this,'' said Purple, who is also external vice-chairman of HKU's Campus TV. Campus TV, started in 1987, regularly broadcasts information about the university and topical community issues. Purple hopes the festival can further promote campus TV so that the information can reach more people. APA television and film student, Foo Luke-hang, said the festival would not only be a show time, but also a chance for students from different colleges to get together and share their experiences in video production. ''Students from different colleges have different presentation methods and styles of production, but we hardly ever meet. ''It is also frustrating and disappointing that our work cannot reach the public because we lack a broadcasting channel,'' he said. The students hope the festival will be the first step to inter-college communication. More long-term programmes such as a joint production will follow. The festival, to be held on November 14 at the Lim Por Yen Film Theatre, Hong Kong Arts Centre, will be in three two-hour sessions (12.30 pm, 3.30 pm and 7.15 pm). Each will be followed by a discussion led by experienced video and film producers. Tickets, priced at $20, are now available at all URBTIX outlets.