Cant play byte array video on apple devices - asp.net-core

Question

I am trying to play a video file which gets sent as a byte array to the client.
It works on android and PC but not on apple devices.
I already tried adding the content range header(not quite sure if this is right), but this didn't do the trick either.
uploading/saving file
var file = await RegisterFileAsync(formFile, uploaderId, categories, packages);
try
{
var filePath = FileStorePath + file.Id;
if (formFile.Length > 0)
{
using (var stream = new System.IO.FileStream(filePath, System.IO.FileMode.Create))
{
await formFile.CopyToAsync(stream);
}
}
if (!System.IO.File.Exists(filePath))
{
throw new System.IO.FileNotFoundException($"File not found ({filePath}) trying to register a file in the database.");
}
}
catch
{
await UnregisterFileAsync(file.Id);
}
return file;
Looks like this:
Backend, sending file to the client:
[HttpHead("[controller]/[action]/{id}")]
[HttpGet("[controller]/[action]/{id}"), HttpGet("[controller]/{id}", Order = 1)]
public async Task<IActionResult> Index(Guid? id)
{
if (id == null)
{
return View();
}
var file = await fileService.GetFileById(id.Value, loadContent: true);
if (file.ContentType.Equals("video/mp4"))
{
Response.Headers.Add("Content-Range", "bytes 0-" + (file.Size - 1) + "/" + file.Size);
}
return File(file.Content, file.ContentType);
}
Response Headers
HTML video player