I don't think all of the videos are super necessary. Sometimes they can be legitimately confusing and make you overthink easy questions. 7Sage has been awesome because of the amount of content it offers and the explanationvideos.
You can find them under the LSAT Questions tab. Click ExplanationVideos, and there will be an option near the top of the page that says Show starred explanations.
Also, under the same "LSAT Questions" header, there is a menu option called "ExplanationVideos". Here you can find videos that will break down each question of each section for almost all the released PTs (except the very newest and the oldest)