2022.05.21 19:37 "[Tiff] How to read JPEG-compressed YCbCr TIFFs", by L. E. Segovia

2022.05.21 20:37 "Re: [Tiff] How to read JPEG-compressed YCbCr TIFFs", by Toby Thain

Not sure about your particular file, but we extract hundreds of thousands of YCbCr JPEG images from TIFFs every day...

What an excellent source of test imagery!!