These images count against your Google Account store, though. The original quality setting does not change your photos and videos in any way - they're stored in the resolution and image quality in which they were originally captured.The advantage of high-quality backup is that it's completely free - your photos and videos do not count against your total Google Account storage space.
Google Photos backs up photos at either 'high quality' or 'original quality.' Likewise, Google Photos supports most common and many uncommon video formats, including MPG, MOD, MMW, TOD, WMV, ASF, AVI, DIVX, MOV, M4V, 3GP, 3G2, MP4, M2T, M2TS, MTS, and MKV files. Google Photos backs up most common image formats, including JPG, HEIC (used by the iPhone), PNG, WEBP, GIF, and most common RAW file formats. The Samsung Galaxy S21 Ultra can capture 108-megapixel images, for example. Some newer cameras are getting close to these image limits. On the other hand, images smaller than 256x256 pixels are ignored to avoid backing up thumbnails and icon images. Each photo must be smaller than 200MB and 150 megapixels, while videos can be no larger than 10GB. Google Photos can automatically back up your photos and videos as long as they meet Google's image size requirements.