Can't add clip with different frame rate and size
I am creating a video that is 4K/24fps. My sequence has a number of 4K/24 clips in it. I'm trying to drag and drop a clip that was shot at 1920/60fps. When I try to do this, the hand has a slash through it and will not let me add it. In media preferences, I have set the "Set to frame size" option. My goal is to add the clip, have it upscale to 4K and have it play in slow motion (24fps, or roughly half speed). How do I do this?
Am I going about this all wrong? How do people make slow motion videos? I was hoping to experiment with even higher frame rates (120fps) and have it play in really slow motion. 120fps in a 24fps video would be 1/5 normal speed, no?


