Selecting video file in Fragment

[Mukhammadjon-Jalolov]

I am creating a Fragment in an app which displays this Fullscreen video view. The fragment has a button to open a device directory. Right after selecting a video file I'm creating a file from it in onActivityResult. But when I assign this File to fullscreen-video-view (inside onActivityResult) the app crashes after selecting a video

`override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
super.onActivityResult(requestCode, resultCode, data)

    if(requestCode == 55 && resultCode == Activity.RESULT_OK){
        val myinputstream = requireContext().contentResolver.openInputStream(data?.data!!)
        myVideoFile = File.createTempFile("vid", "vid")

        myinputstream.use { input ->
            myVideoFile.outputStream().use { output ->
                input!!.copyTo(output)
            }
        }
        fullscreenVideoView.videoFile(myVideoFile)  // myVideoFile is declared as **lateinit var myVideoFile: File**  
    }
}`

How to solve this issue? Where should I use fullscreenVideoView.videoFile(myVideoFile) after selecting a file... Thank you for help!