Thanks you all for your solutions.The below solution worked for me  <!-- Video tag --> <tag name="video" action="validate"> <attribute name="src"> <regexp-list> <regexp name="anything" value=".*" /> </regexp-list> </attribute> <attribute name="data-type"> <regexp-list> <regexp name="anythin...

Hi @kapil_rajoria ,Thanks for the responseI have tried with the given configuration ,still it's not working .Please find the dialog structure I have created for the reference. 

Hi,I was trying to embed a video in rich text editor through source edit as below .On saving the dialog the video tag is getting saved in the property but when I open the dialog again the video tag is not appearing and at the same time the video is not being displayed on the page too .<video width="...