I am wording one article with k2 on a template halycon of joomla.

I am i beginner but do not take tha againt me,please.

I clicked in the media to unclude a video and the next fields appears:

*ViDeO TYPTE->(selected) Youtube.
*ID????? what is meant by this the sharing URL that provides youtube or the number at the bottom of the video? (image attached).
*image caption-> How can I fill this field,it is mandatory?
*image credit-> Hoe can I fill this field , it is mandatory?

Can anybody helps me?

Thank you

For the Video ID you can either copy the YouTube url, i.e. www.youtube.com/watch?v=-gLknpv9Ksc or just the ID of the URL, i.e. -gLknpv9Ksc
The credits and caption fields are not mandatory. You can provide any information you want in them.