Upload file using Retrofit

UploadFile.kt

private void uploadFile(File file){
        RequestBody videoBody = RequestBody.create(MediaType.parse("video/"), file);
        MultipartBody.Part vFile = MultipartBody.Part.createFormData("upload-file", file.getName(), videoBody);
        UploadVideoService videoService = RetrofitClientInstance.Companion.getRetrofitInstance();
        Call<ResponseBody> serverCom=videoService.uploadVideo(vFile);
        serverCom.enqueue(new Callback<ResponseBody>() {
            @Override
            public void onResponse(Call<ResponseBody> call, Response<ResponseBody> response) {
                ResponseBody body = response.body();
                try {
                    String data = body.string();
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }

            @Override
            public void onFailure(Call<ResponseBody> call, Throwable t) {
                String message = t.getMessage();
                String test = message;
            }
        });
}

class RetrofitClientInstance {
    companion object {
        fun getRetrofitInstance () : UploadVideoService{
            val retrofit = Retrofit.Builder()
                    .addCallAdapterFactory(RxJava2CallAdapterFactory.create())
                    .addConverterFactory(GsonConverterFactory.create())
                    .baseUrl("https://your base url here")
                    .build()
            return retrofit.create(UploadVideoService::class.java)
        }
    }
}
interface UploadVideoService {

    @Headers("Content-Type: video/mp4")
    @Multipart
    @PUT("/your endpoint here")
    fun uploadVideo(@Part videoFile : MultipartBody.Part): Call<ResponseBody>

}