This is to to help out anyone who is struggling with some of the methods or tags used to post pictures \ youtube videos etc in their posts
Some common Tags used on this forum are:

All tags are enclosed by [ ] brackets, The format to use all tags on this forum is [OPENING TAG] [/CLOSING TAG]
There are TWO methods (GUI method and via Tags) for posting pictures, links and quotes but the way to insert video clips from the Youtube website is to use the youtube tag method outlined below 
Below are some examples, the GUI method is shown first followed by the TAG method. In the examples of the tag method the tag syntax is outlined first followed by the result underneath:
Posting Pictures:
The Gui Method:
From the tool bar on the post composition screen click on the Insert/Edit Image button:

Enter the pictures URL (Web Address) into the Image URL field and you can also enter a picture description into the Image Description field, this will display when the mouse is hovered over the image and then click insert. This will put the image into your post. 
The IMG tags method:
You can insert pictures into your posts using the IMG tags, inserting the URL (web address) of your image in between the tags like in the example below:


Posting Images Via Photobucket
You can obtain a free Photobucket account here to host your pictures online.
- Upload your pictures to photobucket
- Underneath the uploaded picture there will be four links, copy the IMG Code link to your clipboard

- Paste the link into your post on the forum
- Write your post and then upload
Inserting Hyperlinks:
The GUI method:
On the post composition screen, highlight the text you wish to make into a hyperlink and click on the Insert/Edit Link button in the tool bar:

Type the target address of your Link into the Link URL field and select from the options in the Target field, depending on weather you want the link to open in a new window or the window that it is viewed from, navigating away from your current page.

The URL tags method:
You can insert click-able links that open in a new browser window into your posts using the URL tags. After the = in the opening tag insert the URL of the target (this can be the address of a web page or a picture) Then insert the word you would like to make "Clicky" in between the opening and closing tags as in the example below:

UKMKIV's Forum
Quoting another user in your post:
The GUI method:
To quote the content of a message in your reply you click on the quote button in the message sumary above the reply window, this copies the text into your reply.

The text that was in the original post will be displayed between formated Quote tags in your reply ready for you to add your response at the bottom

The Quote tags method:
The quote tags can be used to manually insert a quote of the content of another users post into your post, this can be useful when replying to multiple people in one post so everyone knows what you are talking about and who to.

Billy No Mates:I have something really interesting to say – honest

Adding a Youtube clip to your post:
The youtube tags:
You can display youtube video clips in your posts by using the youtube tags in your post, insert the URL to the youtube video in between the opening and closing tags as in the example below, but beware the youtube tag is case sensitive and must be lower case:

http://www.youtube.com/v/9fqGmRnVDGs
View original media here: http://www.youtube.com/watch?v=9fqGmRnVDGs
Tags can be combined to get clicky thumbnails:
By using a combination of the URL and IMG tags you can create a clicky thumbnail image, just replace the Text portion of the link you would use in the URL tag with an IMG tag to display a thumbnail picture, as in the example below:


This method can also be used to link an image to a video file hosted on the internet 
If there are any additions then let me know and I will keep this first post updated 
Neil