Although we can reduce iPhone videos’ size by lowering the bit rate, the videos’ quality will definitely be damaged. So, is there any way to keep the original quality while compressing video size. Here, we highly recommend HD Video Converter Factory Pro to you for it can compress videos with original quality preserved. For example, it can compress 4K videos with the highest quality, compress AVI videos, and also can compress audio files. Therefore, with HD Video Converter Factory Pro, you can easily resize iPhone videos without any quality loss. Now, let’s follow the process to reduce iPhone video file size.