Video links in image

I wish to add a video link to an image. I’m making a list of videos, but I dont want to show the video preview, only thumbnails that can be clicked on to get to the video. I have tried to add the link to the image in teh usual way by clicking on the picture and add the URL link in the URL box that pops up, but that only leads to that the videos itself shows up in the posting below the picture.

Anyone who has a god tip for this

Thanks in advance.