Hello, there is no longer the microphone icon in the YouTube search engine, it seems to me that the functions within each application correspond to the developer of each application individually, as an example: YouTube on the one hand, Netflix separately .. each developer updates or not their application for each platform (webOs, tyzen, Android, etc ..); Some are loaded as an update of the complete application, that gives to put it in some way a channel or working context to the installed version, like a framework, within which one reads what comes from the internet, that content can present some modifications to the same interface that one receives, such as changing the content of youtube channels, new videos ... I do not know what would have been the case, since I take general ideas to suppose, if the YouTube developer for this platform removed that function through an update of the application or only the content that the application reads when connecting to its platform. I did not realize when it was gone. but you would have to make the request to YouTube and its developer. As another example, hbo can be accessed from any browser and it is like viewing an internet page, some time later they had the application for lg enabled in some countries and it took months, or 1 year to appear in Latin America, I am from Argentina, At that time he accessed through the browser, made the criticism and request to lg and hbo to enable it, when they enabled the application it had the same appearance, delays and functions, and when he modified some sections, he had not yet updated the application. on the basis of that my assumption for this case. If you get more accurate data, do not hesitate to comment or share it so that the rest of us can continue learning too, thank you ..