Question: What is a word that can best describe YouTube bad content such as pranking videos, which negatively affect children? 

I thought about the word banal but it doesn't seem to fit. 

[Edit] As we know that children love to imitate actions they like, I'm implying the fact that this content, which get a lot of views by children, detrimentally affect children's personalities by persuading them to normalize inappropriate actions such as filming people on the street, generally invade other's privacies, bully or being offensive to others. Moreover, I'm comparing this type of content to the informative content on YouTube such educational videos

Answer: 
"Banal" would mean "dull, uninteresting, and generally pointless". I think you're looking for something more like ["malicious"](https://dictionary.cambridge.org/us/dictionary/english/malicious):

> 
> The worst thing about those **malicious** videos of children doing terrible things to strangers, is that their **notoriety** might inspire other children to do the same.
> 
> 
> 

Other possibilities: *nasty, immoral, vicious, mischievous, awful, heinous, ugly, vile, depraved, offensive, disgusting* and various others. 

Each of these can have a different nuance, but if you explain *exactly* what you want to say, I might be able to point to one of them as the most appropriate -- for example, do you want to focus more on the *immorality* of the acts show in the videos, or on how they *offend* you personally?

[Edit] As you might expect there is no single word to describe everything you want to say. However you might try some combination of these:

> 
> [**irresponsible**](https://dictionary.cambridge.org/us/dictionary/english/irresponsible) (adj): not thinking carefully enough or not caring about what might result from actions taken
> 
> 
> [**frivolous**](https://dictionary.cambridge.org/us/dictionary/english/frivolous) (adj): (of people) behaving in a silly and foolish way, or (of activities or objects) silly or unimportant:
> 
> 
> [**infamous**](https://dictionary.cambridge.org/us/dictionary/english/infamous) (adj): well known for something bad; notorious:
> 
> 
> [**seductive**](https://dictionary.cambridge.org/us/dictionary/english/seductive#dataset-cald4) (adj): making you want to do, have, or believe something, because of seeming attractive:
> 
> 
> 

For example: 

> 
> While these videos might seem like so much harmless **frivolity**, they encourage **irresponsible** behavior among young people who have yet to develop the **moral compass** to distinguish the **malicious** from the benign.
> 
> 
>
You can use the catch-all phrase: 

> 
> "Content unsuitable for younger viewers"
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> 
>