[jihyeu]

What are the main differences between a "DJ" and a "Non-DJ" Headphone?
 
What are their strengths respectively?
 
Can I use a "DJ" headphone for daily uses: music, youtube...?
 
Thank you

 

[MrTechAgent]

Of course you can 
 
Some general characteristics of a DJ headphone 
 
1) Usually Supra-Aural (On-Ear)
2) Tilting and Folding EarCups 
3) Boosted low end 
4) Classic v700dj design , which all have been copying since it came out 

 

[ieee754]

DJ headphones are usually very uncomfortable (high clamping force blocking outside sound so you don't get deaf during parties) and have unlistenable amount of bass (at least for me). I don't recommend them for uses other than professional.

 

[zunehdrocks]

It varies way too much to say anything meaningful...

 

[SteveHiFi]

Some mixed opinions there.

 
DJ headphones may not be of a low enough impedance to be properly powered from portable devices such as a phone or laptop. Check the rating, if they're much over 50 ohms then don't bother unless you have a separate amp.
 
It strikes me that you are only considering DJ headphones as they seem a bit sexier, but they're not really. Just with a few features to make DJ's lives easier, like coiled cable and rotating earcup etc.