user26703: My question comes in two parts. First, may I know if my assessment of the quality of the footage in this Youtube movie is correct in the first place. 
Compare the frames around 2:07 of this movie: 


(2:07)

with
the frames around 1:59:



(1:59)

The quality of the picture in the former seems better than the latter. I am not exactly sure what is the difference, I can't pinpoint. But this was my first reaction when I was watching the clip.
After close examination for a while, I can only guess that the former seems to be a bit more blurry, have softer edges, and seems to be a bit darker as well.
Is my analysis correct, and am I missing anything else?
Secondly, how could the quality of the latter been improved at the recording stage? Is it something that could have been set in the camera, or should a better camera been used, and if yes, what exact specifications in the new camera should be sought?
My guess is the former uses a production video cam, but the latter uses perhaps an action cam like the GoPro. But must we always have such suboptimal footage from action cams, or could a better setting be used?
(NOTE: I did not participate in the production at all in the clip, so I do not know whatsoever what cams were used etc.)

user24627: If I understand correctly, your question is "why is the footage of this camera blurry".
The answer to that would be: It is out of focus. Cameras have a focal point and everything straying away from that (spatially) will get blurry. You can see that the back-windows is in focus, meaning that the lens has its focal point further back.

26703: <p>My question comes in two parts. First, may I know if my assessment of the quality of the footage in this Youtube movie is correct in the first place. </p>

<p>Compare the frames around 2:07 of this movie: <div class="youtube-embed"><div>
                <iframe width="640px" height="395px" src="https://www.youtube.com/embed/HIlXOqxsRUQ?start=127"></iframe>
            </div></div>
(2:07)</p>

<p>with</p>

<p>the frames around 1:59:
<div class="youtube-embed"><div>
                <iframe width="640px" height="395px" src="https://www.youtube.com/embed/HIlXOqxsRUQ?start=119"></iframe>
            </div></div>
(1:59)</p>

<p>The quality of the picture in the former seems better than the latter. I am not exactly sure what is the difference, I can't pinpoint. But this was my first reaction when I was watching the clip.</p>

<p>After close examination for a while, I can only guess that the former seems to be a bit more blurry, have softer edges, and seems to be a bit darker as well.</p>

<p>Is my analysis correct, and am I missing anything else?</p>

<p>Secondly, how could the quality of the latter been improved at the recording stage? Is it something that could have been set in the camera, or should a better camera been used, and if yes, what exact specifications in the new camera should be sought?</p>

<p>My guess is the former uses a production video cam, but the latter uses perhaps an action cam like the GoPro. But must we always have such suboptimal footage from action cams, or could a better setting be used?</p>

<p>(NOTE: I did not participate in the production at all in the clip, so I do not know whatsoever what cams were used etc.)</p>
 24627: <p>If I understand correctly, your question is "why is the footage of this camera blurry".</p>

<p>The answer to that would be: It is out of focus. Cameras have a focal point and everything straying away from that (spatially) will get blurry. You can see that the back-windows is in focus, meaning that the lens has its focal point further back.</p>
