John wants to know if he can display slideshows and control them from his smart TV with his mobile phone. Leo says that he can through the Google Home app. If they are connected on the same network. He can also create slideshows with Google Photos.
Doug just got back from vacation and would like to turn their photos into a slide show with titles and music, as Google photos doesn't do it. Leo says that it used to be a thing that Google would do. Any presentation manager would, like Apple Keynote or Microsoft Powerpoint. Corel makes the best one though: Corel PaintShop Pro Photo. But you can also use Corel Video Studio to do it. Here's how - https://learn.corel.com/tutorials/videostudio-create-slideshows/.
JR wants to know what would be the easiest way to set up a slideshow presentation that he can show on an HDTV. Leo says that many TVs have USB slots, but it depends if the software supports running photo slideshows. JR could use AirPlay with his iPhone and keep the slideshow on it. Or he can make a movie of the slideshow and the TV could play it.