The video gallery is located at https://www.nzbees.net/gallery/category/2-video/
To post, you will need to first need to create a thumbnail image or get one from your provider website.
If you are not sure how to do this, you can use a youtube thumbnail grabber at
https://boingboing.net/features/getthumbs.html simply paste your youtube url into the page and select a suitable thumbnail.
Click Add images
Add your thumbnail at step 2 where it asks for your image
Create a caption and a description
ADD YOUR YOUTUBE URL TO THE DESCRIPTION
Your video will embed
Click finish editing