Due to the current implementation, the frontend must download the entire file, which in turn prevents buffering ("the frontend has to download the whole file first") in the video / audio control:

Bun supports Streaming files:

You can send part of a file using the slice(start, end) method on the Bun.file object. This automatically sets the Content-Range and Content-Length headers on the Response object.

However this behavior doesn't allow seeking ("jumping to a timestamp") because the actual size is not set in the Content-Range header:

• Bun: bytes 0-10/*
• Required: bytes 0-10/20

manually setting the header works but it ends up twice in the response (with [email protected] - due to slice(start, end))

new Response(Bun.file(filename).slice(start, end), {
  status: 206,
  headers: {
    'Content-Range': `bytes ${start}-${end - 1}/${size}`
  }
});

HTTP range requests