What does the TypeError in react-youtube mean when it says that it cannot read properties of null, particularly the 'playVideo' property?

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The TypeError in react-youtube means that the code is trying to access the 'playVideo' property of a null or undefined value. This could happen if the YouTube video is not properly loaded or if the component responsible for handling the video player is not rendered yet. To fix this error, you may need to ensure that the video is properly loaded or add a check for null or undefined values before accessing any properties.