What are Moderators?
Moderators are individuals (or groups of individuals) whose job it's
to look to the rules and the running of the forums daily. They have the
power to edit or delete posts and lock, unlock, delete and split topics
in the forum they moderate. Generally moderators are there to prevent
people going off-topic or posting messages that do not respect the
rules.
What are Administrators?
Administrators are people assigned the highest level of control over
the entire board. These people can control all facets of the forum,
this includes setting permissions, banning users, creating groups of
users or moderators, etc.. They also have all the powers of moderation
on all the forums.
What are Usergroups?
User groups are a way in which board administrators can group users.
Each user can belong to several groups (this differs from most other
boards) and each group can be assigned individual access rights. This
allows the administrator to easily manage different moderators of a
forum, or to give them access to a private forum, etc..
Images
You can display images within your posts. To view an image, you can
either use the tag BBCode [img] tag or is the appropriate HTML
Video (youtube, dailymotion,...etc)
in the page of the youtube video, copy the code that is written in (Embed a video on a site), and paste it into your message
or simply copy the address of the page