For using image links and embedding them here to show up as full images (this is especially useful if you have a lot) is to use the BB Code image tags:To embed videos:
-Click on "Insert Link" button (shaped like the planet)
-Paste Video URL
-Remove "s" from "https"
To upload images:
-easiest would be to upload them into your album or a third party hosting site and just link them into your posts using the "Insert Image" button. (yellow box with a mountain)
To upload images 2:
-If replying to a thread, click "Go Advanced"
-scroll down until you see Additional Options
-Attach Files should be under that heading