A dataset about the evaluation of the web accessibility of videos published on YouTube by worldwide top-ranking universities

The objective of this study is to evaluate the accessibility of the videos published on YouTube by the best universities in the world, based on compliance with the Web Content Accessibility Guidelines (WCAG) 2.1 of the World Wide Web Consortium. We have carried out a manual evaluation of 91,421 videos, which are all published on YouTube by 113 universities taken from the Shanghai Ranking. Currently, there are no automatic tools that allow evaluating all the accessibility requirements; therefore, in this study we have had to manually evaluate the 91,421 videos published by a sample of 113 universities selected from the best universities in the world. In this research, we have proposed four hypotheses as a starting point: - Hypothesis 1 (H1): The number of videos published on the website of the best universities in the world does not have a normal distribution. - Hypothesis 2 (H2): The distribution of videos with captions varies according to the region of the world where the universities are located. - Hypothesis 3 (H3): The distribution of videos with captions have significant differences according to the ranking in which the universities are located. - Hypothesis 4 (H4): Shanghai Ranking is a good indicator of the level of accessibility of the videos published by the universities considered as the best worldwide.本研究旨在基于万维网联盟（World Wide Web Consortium）制定的《网页内容无障碍指南2.1（Web Content Accessibility Guidelines 2.1，WCAG 2.1）》，评估全球顶尖高校发布于YouTube平台的视频的可访问性。我们对取自上海软科排名（Shanghai Ranking）的113所高校发布的91421条YouTube视频开展了人工评估。当前尚无能够覆盖全部可访问性要求的自动化评估工具，因此本研究需对上述113所入选全球顶尖高校样本所发布的91421条视频进行人工评估。本研究提出四项假设作为研究起点： - 假设1（H1）：全球顶尖高校官网发布的视频数量不服从正态分布； - 假设2（H2）：带字幕视频的分布情况因高校所在地区而异； - 假设3（H3）：带字幕视频的分布情况因高校所属排名区间存在显著差异； - 假设4（H4）：上海软科排名（Shanghai Ranking）可作为衡量全球顶尖高校发布视频可访问性水平的有效指标。