If you want to add images to your post ,then just follow this sinple process !
In any website, u can get the image link from the properties of the image....
Right click on the image -> select properties -> get the image url
directly use the option "copy image URL", this will save url to ur clipboard and paste the link as above
Similar way you can get the image URL from Facebook Pics as well...
You Can Click On Image Icon In Post Editor and Enter Image Url
How to post images and videos from mobile ?
To Post Image :
[img]image url here[/img]
For Youtube Video :
[video=youtube]Youtube video url here [/video]