If you are looking for specific assets to download, you can explore several digital asset marketplaces and content libraries:

Change the to Multiply (or Screen , depending on whether the matte is black or white).

Check graphic resource sites like Freepik for static PNG film borders or browse community-driven YouTube editing channels that often supply free download links in their descriptions. Film Split Screens + Kodak Filmburns | How to use tutorial

Lower the opacity if you want a more subtle, organic light leak effect. 3. Adding Film Grain

Place a real film grain overlay on top of all your video tracks. Set the to Overlay or Hard Light .

Navigate to your software’s effect controls or composite settings.