How Vidstudio Streams and Caches Video in the Browser to Manage RAM

Vidstudio is a browser-based multi-track video editor that operates without any backend services, making efficient RAM management critical for its timeline feature. Because loading large video files entirely into memory risks crashing the system, the editor streams files instead, processing only the requested portion at a time. To reduce latency from repeated disk reads and decoding, Vidstudio maintains a cache of encoded video chunks, which are far smaller than decoded frames, and keeps a narrow window of decoded frames near the current playback position. When users scrub rapidly across the timeline, a debounce mechanism ensures only the most recent seek operation consumes device resources, cancelling earlier ones still in progress. Each of these design choices reflects a deliberate trade-off between conserving end-user resources and maintaining a responsive editing experience.