Sure, MuhammeT ! Ok, in the attached screenshot you may see the "Create new post" form which is available under URL like [UNA]/page/create-post. You may see that it contains the "Text" field with Froala editor which includes the "embed URL" button. So it's better to use this app for the sharing Youtube videos instead of Videos app which is used for video upload (that's why the "video" field there is required).
Hi, i think what MuhammeT means is that if he can disable the mandatory for the video mod, if so he can go to studio > forms > fields > from drop down choose videos > then select add video > scroll down to video > click on the pen > then uncheck mandatory