For those seeking effective Precalculus tutorials, several resources are recommended. YouTube offers a variety of precalculus videos, including a dedicated search for relevant content. Khan Academy is highlighted for its comprehensive range of educational videos, although specific feedback on its precalculus material is lacking. Math TV is suggested for its focused Trigonometry section, which may be beneficial for precalculus students. Additionally, a link to a resource from the University of Colorado is provided, which could enhance understanding of the subject. Overall, these platforms offer valuable options for learning precalculus through both DVD and streaming formats.