How to broadcast video with rewind capability in Asp.net mvc?

Question

JavaScript

Hello, I'm learning to display a video on the site from a file. If you take the whole file and transfer it to the page, it works, the video is displayed, but I would like to deal with the following question: how to display the video not in its entirety, but, for example, from the middle? this may be needed, for example, if the video lasts 2 hours, and so that immediately after opening the page, the user can rewind the video to 01 hour 45 minutes and not wait for the file to fully download.
I saw this on YouTube. When you rewind - prev. the video request is canceled, and a new video request is created not from the beginning, but from the right minute.
With the help of trace. In the code, I tried to just jump 2500000 bytes forward (the video is 5MB in total), but the video is not displayed.
Video format: mp4

public override void ExecuteResult(ControllerContext context)
        {

            var strVideoFilePath = HostingEnvironment.MapPath("~/Content/big_buck_bunny.mp4");

            context.HttpContext.Response.ContentType = "video/mp4";
            context.HttpContext.Response.AddHeader("Content-Disposition", "attachment; filename=Test2.mp4");

            var objFile = new FileInfo(strVideoFilePath);

            var stream = objFile.OpenRead();

            int fakeLen = (int)stream.Length - 2500000;
            var objBytes = new byte[fakeLen];
            stream.Seek(2500000, SeekOrigin.Begin);
            stream.Read(objBytes, 0, fakeLen);
            
            context.HttpContext.Response.BinaryWrite(objBytes);

        }
    }

Answer 1

The video file must be sent from the server in its entirety. It cannot be cut like a regular array of bytes - this violates the format, and it will be impossible to play the video.
Instead, use the player's own API on the client side - when the page loads, execute a script that will tell the player to rewind to a certain point. If the player (and your server) supports uploading files from an arbitrary location (and not from the very beginning), then it should work.