LibreTube is an alternative frontend for YouTube. It uses the
Piped API to load data and play videos and thus needs no YT account and no Google Services on your device.
YouTube has an extremely invasive privacy policy which relies on using user data in unethical ways. You give them a lot of data - ranging from ideas, music taste, content, political opinions, and much more than you think.
By using LibreTube, you can freely watch and listen to content without the fear of prying eyes watching everything you are doing. Apart from that the Piped proxies can bypass geo restrictions, therefore LibreTube can be used in countries where YouTube is blocked.