'<iframe src="https://www.youtube.com/embed/dQw4w9WgXcQ" title="YouTube video player"></iframe>';
consthtmlWithVideoTag=
'''<video src="https://www.youtube.com/embed/dQw4w9WgXcQ">Your browser does not support the video tag.</video>
''';
'<video src="https://www.youtube.com/embed/dQw4w9WgXcQ">Your browser does not support the video tag.</video>';
consthtmlWithNormalLinkAndVideo=
'<a href="https://www.macrumors.com/" type="text/html">fdsfsd</a><br><video src="https://www.youtube.com/embed/dQw4w9WgXcQ">Your browser does not support the video tag.</video>';
finalexpectedDeltaEmp=Delta.fromOperations([
Operation.insert(
'This is a normal sentence, and this section has greater emp'),