>>350425Google uses same advertisement selling methods in Youtube as they do on search engine and gmail.
You can literally pay up to get more search hits even though your video/website/keyword is not exactly the same what people has searched for.
https://www.youtube.com/intl/en-GB/ads/You can even tag keywords or meta info which makes your website/video to pop up in search resaults. You can go and buy one month advertisement for #hololive tag and specify that every single time your channel or channel's upload get visibility.
Even without paid advetisements, Youtube create "trendings" which get free visibility if those videos/broadcasts share common meta tags. These trends are reason why you need to specify which category your uploaded video belongs.
