How to include more than one image/video in a post ?

Apologies for the delay in replying to you.
If you want to add more than one image/ video in a post, you can log in to Dashboard > Posts > Add new:
– To add more than one images, you can press Add Media button then press “Ctrl key + select the images” to insert the images which you want to display in posts.
– To add a video, you can copy link or embed code from youtube.com / http://vimeo.com/ then add to the post. With this way, you just add the other video as you prefer. See the screenshot: http://imgur.com/Ya8O2Z3