- 30" LED TV. Pretty cheap these days.
Win 10 'stick' tiny computer. Ridiculously cheap, even in expensive Australia
Another frustration is that ALL the slideshow apps refuse to sort numerically, they all sort alphabetically. I have about 4,000 pics in the slideshow folder. If you want them to be in order, naturally you name them numerically. So none of the apps will show the pics in the correct order. I use Directory Opus (DO) and it lets you rename files easily. Using DO, I renamed the 4,000 pics as 0001, 0002 etc. Works a treat.
If you want short videos included in your slideshow you do need to ensure your app can play videos alongside pics. I needed the Pro version of gPhotoShowPro to enable videos.
The Win 10 computer takes a mini SD card that looks just like a disc drive in explorer (DO in my case). I can access this drive from my main computer, making additions a breeze. And there is no limit to the number of pics.