To insert a youtube video into a post:
insert the file number of the video between the youtube tags
For example the link is 
http://www.youtube.com/watch?v=Y_Y26JNd3g4
then the file number is Y_Y26JNd3g4
so typing the text-->

gives you this:
  
Make sure there are no spaces.
To enter a photo from the web click 

in the edit window and enter the full address.
If you want to post your own photo you need to upload to your personal album and then link it the way i described above 

You can create Albums of images that are linked to your public profile. Albums can be created by visiting the 
User Control Panel, and clicking on the 'Pictures & Albums' link, and then clicking on 'Add Album'.  Each album can have a title ('Joe's Holiday to Nepal'), a description ('A bunch of photos from my recent adventure') and can be of three different types: Public, Private or Profile.
  
- Public albums can be viewed by anyone
- Private albums can only be viewed by site staff (moderators, administrators) and your Friends and Contacts (info)
- Profile albums are viewable only by you. However, you can use the images to customize your public profile (info)
Hope this helps 
