We 'Import' photos and video into Lc CC Classic. We ADD them to Lr CC. Which are you using?
Regardless: Both accept and play .mp4 videos. Just tested on both softwares. Tested on Lr CC Web. The only place they don't play is Lr Apple TV
Hi Neox99, thanks for the reply. I have been adding videos to the "new" Lightroom CC. I've been using the Mac client and as it turns out, the Mac client doesn't allow me to play any previously added videos nor does it allow me to add any new videos. The web-based client allows me to do both. I can also play previously added videos on the new 4K HDR Apple TV -- haven't had an opportunity to test any of the videos I just added through the web-based client. Anyhow, the problem seems to be with the Mac client. Any thoughts are appreciated. Thanks!