Re: "My iPad is not charging or turning on"
See Apple Support's online article: Charge the iPad battery - Apple Support for tips:
If the iPad is still not charging ok: See the Apple Support article If your iPad won’t charge.
You may want to check the charger and its cord are ok, and working ... and try plugging in to a different power-point in case that's the problem.
If needed: You can also try a Forced restart ... the above article gives the steps to follow.
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Re: ."..and the charging logo keeps on turning on, but nothing is plugged into it "
The iPad may just be telling you it has "low power" and it needs charging before you can use it.
Eg: The first article above says: "If iPad is very low on power, it may display an image of a nearly depleted battery, indicating that it needs to charge for up to 10 minutes before you can use it".
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Re: " ... and it won’t turn on"
The iPad screen won't turn on if the battery has run right down, seems the iPad is out of power.
Re: "I tried all these videos on YouTube"
Good on you for researching and trying what you could. Hopefully Apple Support's articles above will help you get the iPad working again.
If you find you do still need help, try reaching out to iPad Support. You can use the "Get Support" link (online chat / phone / email etc.) at the bottom of their webpage: iPad - Official Apple Support
All the best :-)