OLED or Mini LED for GoPro 4k footage?

Hi, I’m upgrading my tv and looking at the OLED EVO C5. My priority is not image quality for television/movies, but for editing and viewing underwater 4k GoPro snorkeling footage and running photo slideshows. I’m worried about judder/stutter on an OLED with 60fps footage, and don’t want to sacrifice image detail to smoothing any more than necessary. My tv gets little to no direct light and I usually sit about 10 feet away, but I want to stream video and photo slideshows while I’m doing things around the house as well. I am looking at 48”-65” but am concerned I will lose photo quality the larger I go. So, OLED or Mini LED for best video quality, and what size in that range for best photo and video quality? Should I look at a brand other than LG? I’m just about at my budget max with the C5 and would like to get the $100 discount by buying before the Costco discount expires. Thanks!