I understand that there are many forum posts to go through, but there is sufficient information in the previous posts for you to get the answers that you seek.
On Hackthis and mainly on all forums, we use bbcode.
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Remove just the spaces.
You have 2 little errors in your code.
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Why the action of your from is /levels/b3.php ?
Why did you set the name with movie ? What do you need to submit here ? A movie ? :p