: Double-click the file in your system's File Explorer. For smooth playback of high-bitrate HD files, using a modern SSD is recommended as read speeds are much faster than the video's data rate.
Click in the top right, select your export quality (e.g., 1080p for HD), and save. On Mac or iPhone (iMovie) Launch iMovie and start a new Movie project. Import your MP4 files by dragging them into the timeline. Load Mp4 Hd9
HD files are significantly larger than standard definition. A "Load Error" is often just a timeout caused by a slow internet connection. : Double-click the file in your system's File Explorer