In playYouTube.tsx line 78 replace <React.Fragment>...</React.Fragment>
with <div>...</div>
Fragments let you group a list of children without adding extra nodes
to the DOM.
This explains the error
Uncaught DOMException: Failed to execute 'removeChild' on 'Node': The node to be removed is not a child of this node.
More on fragments here https://reactjs.org/docs/fragments.html