Youtube search engine optimization works similar to that on search engines. It is a process of increasing awareness of your brand and boosting your popularity among the audience. By using certain keywords in titles, descriptions, captions, etc, it can be made easier for people to find your youtube channel. Using aesthetics for videos and thumbnails can also make your page visible and appealing to customers. The optimal video length can be found by observing how long a person stays on your page or how long they watch your video for. If most people are watching only 60 seconds of a 2 minute video, it is a sign for you to make videos that are normally 60 seconds only to capture customer attention.