I haven’t decided if I’ll watch the video or not yet.
The kanji and the word are exactly the same. That means they share meanings as well.
Since this word is made up of a single kanji, it probably uses the kun'yomi reading. You did not learn this reading, so here's a mnemonic to help you:
Instead of saying "no" you say "na," and instead of saying "na" you say いな. It's also commonly used for just about every way to say "no" like いいえ and いや, so as long as you know how to say no, you know this reading!