Today! I will share you about xtblog trick, this is the simple code but it is helpful. Do you want create a video blog in xtgem or sextgem? this is the best trick to look your site awesome.. Read carefully, and follow my instruction.
This blog post is the sample our post.. You can see the image in the blog list but here in the blog post? it is disable. If you want create a video blog? paste the embed code to your post.

1.Create the folder for thumbnails of your images per blog post.
2.Add this code for the post you want to. (remove the (+) plus sign in the code)
<i+m+g id='hrefId' src="/FOLDER-CREATED AT THE FIRST STEP/name of image.jpg" alt="" class="img-thumbnail"/> <style type="text/css"> .disabled { display:none; } </style> <script languae="javascript"> var myPicture= document.getElementById('hrefId'); myPicture.className = "disabled"; </script>