Issues with uploading different youTube videos for different pages using CMS

Hello, so on my wix site i have around 30 pages all connected with different information and photos via CMS. However, i am trying to do the same thing with adding a youTube video to each page and i cannot seem to get a different one for each. Could anybody help and/or perhaps give me a run through of what to do or what they suggest?

Any help is greatly appriciated.

Thank you