The three most important aspects of video SEO for YouTube are your title, your description, and the tags you add to your video. Get these right, and your videos will start climbing the ranks. Discovery starts with figuring out what people search for. Once you know that, it will affect both the videos you create and the SEO for those videos. To enhance your video discoverability, ask yourself what the top ten to twenty questions are that your target audience might be searching for on YouTube.