user1451: I have downloaded a video from youtube to my laptop. It is 640x360px mp4 format.
I'd like to edit it a little bit with Premiere CS5. How do I create a new project with the same resolution of my video? 
It looks like there are a lot of preset but not customizable.

user2197: What you want to do is make a sequence with the same frame size as your source file (in Premiere and other NLEs your project doesnt have a specific frame size, as you can have multiple sequences with different frame sizes in one project)

Open Premiere and Start a new Project (File > New > Project)
Give the project a name and click ok (dont worry about any of the options)
In the New Sequence window click Cancel - this will take you straight into the project without making a sequence
Import your footage (file > Import)
Create a new Sequence from clip by either:

Dragging the footage down to the New Sequence icon (in the project panel) OR 

Right click on the footage and select New Sequence from Clip



This will create a sequence that matches the attributes of your footage (frame size, frame rate etc)

1451: <p>I have downloaded a video from youtube to my laptop. It is 640x360px mp4 format.
I'd like to edit it a little bit with Premiere CS5. How do I create a new project with the same resolution of my video? </p>

<p>It looks like there are a lot of preset but not customizable.</p>
 2197: <p>What you want to do is make a <strong>sequence</strong> with the same frame size as your source file (in Premiere and other NLEs your project doesnt have a specific frame size, as you can have multiple sequences with different frame sizes in one project)</p>

<ol>
<li>Open Premiere and Start a new Project (File > New > Project)</li>
<li>Give the project a name and click ok (dont worry about any of the options)</li>
<li>In the New Sequence window click Cancel - this will take you straight into the project without making a sequence</li>
<li>Import your footage (file > Import)</li>
<li><strong>Create a new Sequence from clip by either:</strong>

<ul>
<li><strong>Dragging the footage down to the New Sequence icon</strong> (in the project panel) OR 
<img src="https://i.stack.imgur.com/bL7fX.png" alt="New Sequence button"></li>
<li><strong>Right click</strong> on the footage and <strong>select <em>New Sequence from Clip</em></strong>
<img src="https://i.stack.imgur.com/i16UL.png" alt="New Sequence from Clip"></li>
</ul></li>
</ol>

<p>This will create a sequence that matches the attributes of your footage (frame size, frame rate etc)</p>
