Use software like Adobe Premiere Pro or DaVinci Resolve to "transcode" your raw files into a more manageable format, like ProRes Proxy or DNxHR.
In modern filmmaking, cameras often record in massive resolutions (4K, 8K) and "heavy" codecs that can cause computers to lag or crash during playback. To fix this, editors create : FILMY PROXY
In some creative communities (like Magic: The Gathering ), "proxy" refers to physical reproductions of cards. For these, "producing a paper" involves: Use software like Adobe Premiere Pro or DaVinci