Greasy Fork

Any way to use this script without login in?

Please tell me there is a way. I will never login in this shit.

I do not understand what you are asking for. You do not need a Youtube account to make it work. However, you need an API key, which you can get by following the instructions.

nothing to be understand there.

Running Yaoi Manga Online

To get such API key, he needs a Google account. I guess that's what he/she complains about. My guess is, he wants an API key from someone instead of creating his/her own.