I think that temperature control within CU's will eventually become mandatory to BS7671; how soon depends on the number of incidents reported. A clip on sensor can be installed to signal this externally to the C.U. or remotely and all for minimum cost.

Jaymack     

Can't see that happening anytime soon - 2 things, lower rated loadings such as LED lamps, do we really need a 6A mcb and 1.00mm cable for domestic lighting these days?

The other obvious thing - No juice=No heat generated, and right now, thanks to the greens we are heading rapidly for no juice.

The current climate change will negate you're suggested proposal.

8 years of no increase in atmospheric temperature increase means no trouble inside your CU. But add in some EV charging and heat pump and the situation may change.

Jon Steward said:

But add in some EV charging and heat pump and the situation may change.

I wouldn't argue with that. Out at work = no need for heating, so the two will coincide. EV could easily be 32 A for a couple of hours. Add another 16 A for a (rather weedy) heat pump. Then take a shower!

Are you trying to say that technical knowledge should be restricted?

I know that there is potential for misinformation and the promotion of bad working practices on YouTube, but it also has advantages of bringing them out into the open rather than concealing them behind closed doors and consumer unit cover plates.

It's certainly plausible that professional qualified electricians do not like the such videos because of fears their livelihood will be eroded by intrepid handymen and DIYers who think they know everything from watching about 3 or 4 such videos one Sunday afternoon.

How about the DB below? All pretty tidy, but the CPCs and neutrals all bunched together. Given the placement of the N bar, I don't really see how it could be otherwise.

On the subject of you-tube or similar videos in general:

I think SOME you-tube videos are completely misleading, especially if you are directed onto an American or international video, and you try to learn from that information without knowing its completely wrong. 

I think SOME British aimed you tube videos are very well meaning and well intended, and show one way to do the job

I think some British aimed you-tube videos are very good, but out of date; 16th, 17th, 18th edition information or whatever the case might be.

I think SOME British you-tube videos are very well meaning and partially wrong

I think some British you-tube videos are simply brilliant (eg sparkyninja and John Ward)

I know though, that when I don't know how to do something - one of my first places to look is you tube.

Usually for things - in my case - outside normal electrical stuff, such as my dishwasher condense pump wont turn off, why, and how do I change it? Or my VW window won't wind down, why, and how do I change the window winding motor.

I assume most people are the same for electrical tutorials. 

So no, not at all, "dangerous to all" - but potentially, yes the information may be right, wrong, partially right, partially wrong or very good. Unfortunately it takes experience to decide what information to listen to. 

Very true- and before the internet it might have been a friend of a mate at the pub who advised on how to fix the car or whatever - the problem really is in a lack of selectivity - how much trust do you place in someone you do not know anything about.
The internet mentality is that folk with a flashier style get more views and to the top of the search algorithms, - again this is not the same as being technically 'right'.
Mind you, the same caveat should be raised for this forum too - the advice may be wrong, not perhaps t because the poster's knowledge is incomplete (though it may be),  but the question asked may also not present an accurate picture, and the missing detail may have changed everything.

I'd not be in favour of banning/censorship, but a general education of the viewer to the variable quality is important.
Mike.

Disclaimer.
The author's ideas are his own and not his employers, and may or may not add any value to the discussion. Advice given  may be incorrect or incomplete. The voltage  of the electrons you put in may go down as well as up.etc etc.

In a way YouTube doesn't introduce any new problems with misinformation that we didn't have before - remember "An Illustrated Explanation of Earthed Equipotential Bonding" by our Mr Cockburn - disseminated with Caxton era technology. YouTube may make it somewhat cheaper and easier - but that also has the result that the audience is probably far more aware that it may contain dross and are less likely to take it as definitive that previous "text book" generations.

   - Andy.

In the days when one had to go to the central reference library, there was an element of editorial control. That is absent online. 

Some manufacturers put films on there; some from people like EFixx seem to be thinly disguised adverts, but reliable; some are downright unhelpful. The real question is whether the intended audience can tell them apart.