Here is the good news: Adobe Premiere Pro comes with a native, powerful, and completely free Luma Key effect already installed. Searching for a "free download" for Luma Key is like searching for a free download for the "Cut" tool—it is already in your toolbox.
While many creators sell "cinematic transition" packs, you can achieve professional results—like removing black backgrounds from overlays or creating high-end transitions—using the tools you already have. What is Luma Key? luma key premiere pro free download
One of the most popular "storytelling" uses for this tool is the Luma Fade transition Here is the good news: Adobe Premiere Pro
Example: Remove a black sky to reveal a sunset from another clip. luma key premiere pro free download