OK, first of all, when did "combing hair" become "detangling hair"?
"
Detangling" is a word made of two parts:
- "De" is a Latin suffix that means "away, off; generally indicates reversal or removal in English". You find it in words like debone, defrost.
- "Tangling" is from the word tangle which means "mix together or intertwine in a confused mass". So when hair is tangled, it is stuck together in a confused mass.
So to
detangle is to "remove tangles".
What we see in the video in the OP is a MTM
combing hair that has no tangles in it whatsoever. She isn't removing tangles. She's combing through fully detangled hair.
Now w/r/t OP's question, I don't think detangling hair is easy whether your hair is relaxed or not. I don't know where the idea that tangles can be avoided if you don't comb hair and wear it lose came from. Until I left home (Kenya) I never knew that there were people who didn't comb their new growth when relaxed. Of course that'd lead to tangles. I didn't even know about daily shedding back then or that that alone would cause tangles if the shed hair was not removed. Common sense just told me that hair that isn't combed will mat and be impossible to comb, and so combing hair daily if wearing it lose was a given.
Similarly when it came to natural hair, combing was a must. Growing up, I never had natural hair that would get longer than SL because I didn't know that type 4B hair was weak and should never be combed dry. But you'd never have caught me not combing my hair. If I wasn't combing it, you can bet your bottom dollar it was braided. And it's something that I've practiced until today.
And you know what, I NEVER detangle. Why? Because I never get tangles. How come? Because I never allow my hair to do crazy ish that would cause tangles. Shake-and-go or wash-n-go falls and under "crazy ish" in my hair's dictionary. I haven't combed my hair with a comb since April 2009. But I haven't let my hair tangle either. I've been in braids or twists, and I remove shed hair when I redo one braid or twist at a time. I
finger comb fully to remove the shed hair, and so I always redo a section that has no shed hair and no tangles. In other words, I don't LET tangles enter my hair...so I never have to detangle.
When I had relaxed hair, tangles were not welcome either and I never let my hair tangle. I never let difference in texture discourage me from combing my hair. When I had new growth, I used Paltas BKC Hair Treatment on my growth and baggied. This made my new growth soft and comb-able the way S Curl does my natural hair. And so I could take a fine tooth comb, part a small section and run the comb from roots to ends. I'd do this till all the roots where combed through and then I'd return to using my wide tooth comb to style the main body of my hair. My roots didn't tangle because I'd combed through it. Baggying nightly kept it soft. (I know some relaxed people who use S Curl for their new growth and if I were relaxed now, that's probably what I'd do. Application has to be meticulous: You part a narrow section, apply to new growth, comb through, repeat.)
And that's something everyone needs to do. Quit letting tangles enter your hair in the first place and the question in the OP will not even be an issue.