I used YouTube API in javascript but No idea how to work this Youtube videos ID.
ytp.loadVideoById(a7(a.j6.a8),0,settings.r5()?“default”:“medium”);
document.location.hash=a7(a.j6.a8);
That is a Javascript command. Do you mean you do not understand the code or how to use it?
It obviously sets the video to a default setting, medium sized and puts it into your “ytp” ID.
Not sure what the hash does.
What are you attempting to create? It is often just easier to embed a video instead of program one.
Perhaps you should tell us which API you are using and show us a little more of the code before and after the two lines you showed us. More info will help us understand your needs.