@notclacke P.S. - The Intel 10th Gen Core i7 8565U quad-core / 8-thread chip in my Lenovo ThinkPad X1 Yoga from 2018/19 has 1.8MHz / 4.6MHz Max Turbo cores. I'll run a 1080p video and check the core frequency.
Playing either a WebM AV1 or MP4 H.264 video file at 1920 x 1080 full-screen averaged about 1.30MHz for all cores. Both hit highs around 2MHz when starting the video and then dropped in CPU usage. Playing both at the same time averaged about 1.8MHz.