The 90D is a versatile APS-C DSLR with capable photo and video abilities but be warned the high-resolution 32.5MP sensor requires sharp lenses which has frustrated many users not aware of pixel density problems. That said it is the best APSC sensor I have seen.
Combined with advanced image processing, 90D is capable of outputting UHD 4K30p and Full HD 120p video, as well as supporting continuous stills shooting rates up to 10 fps.
Struggles with very erratic fast moving tracking (think birds in flight changing directions) great for linear motion. Its not a 7Dii replacement, but better in most every other way than the erratic motion and only having 1 card slot. Its a winner in my book.