user16127: Is it possible to take, for example, this video 

 and somehow make dr. Manhattan's skin yellow/white? instead of blue? Is it possible to take out his figure/delete the surroundings? If yes, then how?

user16118: One way to achieve cutting out the background is by using after effects and rotoscoping Dr. Manhattan out - there are many tutorials online on how to rotoscope. Adobe After Effects CS5- Rotoscope with Rotobrush
Once you've done this, grade Dr. Manhattan to your liking by using a colour correction tool such as levels, and hue/saturation. You may have to rotoscope in/out the colours you want to keep.
Hope this is helpful.

user10931: You can also use DaVinci Resolve.
First node: You can use a qualifier to get the basic outline of Dr. Manhattan (not the glow around him, but the darker blue parts).
Second node: You can feed one output from that first node through hue vs. hue to convert blue to yellow.
Third node: You can feed another output from the first node to a mask.
Fourth node: You can then then blur the mask (outside only, not inside and outside) and tint it to make your yellow glow.
Fifth node: you can use the mask of the 3rd node to select the output of the second node and composite that with the output of the fourth node to get a yellow body with a yellow glow, and no background.

16127: <p>Is it possible to take, for example, this video <div class="youtube-embed"><div>
                <iframe width="640px" height="395px" src="https://www.youtube.com/embed/sNXohNU3tWo?start=0"></iframe>
            </div></div> and somehow make dr. Manhattan's skin yellow/white? instead of blue? Is it possible to take out his figure/delete the surroundings? If yes, then how?</p>
 16118: <p>One way to achieve cutting out the background is by using after effects and rotoscoping Dr. Manhattan out - there are many tutorials online on how to rotoscope. <a href="https://www.youtube.com/watch?v=xYgfDUnA1Ys" rel="nofollow">Adobe After Effects CS5- Rotoscope with Rotobrush</a></p>

<p>Once you've done this, grade Dr. Manhattan to your liking by using a colour correction tool such as levels, and hue/saturation. You may have to rotoscope in/out the colours you want to keep.</p>

<p>Hope this is helpful.</p>
 10931: <p>You can also use DaVinci Resolve.</p>

<p>First node: You can use a qualifier to get the basic outline of Dr. Manhattan (not the glow around him, but the darker blue parts).</p>

<p>Second node: You can feed one output from that first node through hue vs. hue to convert blue to yellow.</p>

<p>Third node: You can feed another output from the first node to a mask.</p>

<p>Fourth node: You can then then blur the mask (outside only, not inside and outside) and tint it to make your yellow glow.</p>

<p>Fifth node: you can use the mask of the 3rd node to select the output of the second node and composite that with the output of the fourth node to get a yellow body with a yellow glow, and no background.</p>
