How to download video from Android app using youtube V3 API?

I have a requirement to upload a YouTube video from an Android app. I want to create an application that I can upload to YouTube, but the problem is devices that do not have google play service. So I want to upload a video using the YouTube API.

1- I went through this API https://developers.google.com/youtube/v3/guides/auth/installed-apps but cannot get from here.

2 How can you download YouTube videos without Google service play?

I also tried android youtube upload video with static username and password but google are deprecated from this API. How can I implement on my Android device using YouTube API v3. Any help is noticeable. Thank.