YouTube SEO involves using various techniques to increase a video’s visibility on the YouTube platform. This visibility can be improved through YouTube’s internal search engine, Google, and specific video searches on Google. It’s important to note that YouTube’s search engine is one of the most widely used, second only to Google’s. By optimizing video SEO, you can also aim to have your videos recommended by the platform. YouTube video SEO efforts typically begin by optimizing titles, descriptions, and tags associated with the video, while also taking into account specific user queries (such as queries starting with “How to…” or “Tutorial…”). Google and YouTube consider various factors when evaluating a video’s relevance, quality, and ranking, such as the number of channel subscribers, likes/dislikes, comments, backlinks pointing to the video, external video embeds, and the content itself (audio and visual). Visual content (images/videos) and voice analysis (used for subtitles) are expected to become important criteria for video indexing and ranking. Therefore, YouTube SEO is constantly evolving to adapt to these new criteria. A concrete example of the challenges of YouTube ranking on Google in universal search clearly illustrates the importance of these practices.