Bitcoin is the first cryptocurrency being made online. After bitcoin was created, it became the prototype cryptocurrency then it was followed by doge and litecoin. Later on in time many coins have been launched some were successful and some become shitcoins due to its failure. It is normal that you cannot see it in you tube since there are no cryptocurrency before bitcoin. Bitcoin was the first to use a whitepaper and blockchain. Due to its success, altcoins or alternative coins begun to sprout trying to copy bitcoin. If you are still willing to learn more about bitcoin and its history you can actually search it in google so you can see its timeline and how bitcoin evolved as time goes by.