A non-sighted user hasn't managed to get to a video without somehow navigating their way there. The people replying to the tracker seem to be under the assumpti

A non-sighted user hasn't managed to get to a video without somehow navigating their way there. The people replying to the tracker seem to be under the assumption that a non-sighted user will just mystically be presented with a video and not know what it is all about. I can't imagine a case where this is likely. Navigating their way there gives them context to what the video will be (in the use case that the video is on a blank page). If the page contains textual content then the user will get context from the text. If the video is completely unrelated to location context or to page-level context then the content will be of little to no interest, so providing an alt description adds no real-world value. Also note that unless the video has audio captioning then the entire video is of little to no interest. Imagine watching something like Lost in Translation with no visual input and no descriptive captioning.