What is the refresh rate of the ipad 8?

According to the official Apple comparison between iPad models on iPad - Compare Models - Apple, the iPad (8th generation) does NOT have ProMotion at all.

Hi there Nasro05,

Thanks for using Apple Support Communities. It sounds like you want to know about the video formats supported on iPad 8th generation. Our iPad (8th generation) - Technical specifications page says that supported video formats on iPad are 48kHz.

"Video formats supported: H.264 video up to 4K, 30 frames per second, High Profile level 4.2 with AAC‑LC audio up to 160 Kbps, 48kHz, stereo audio or Dolby Audio up to 1008 Kbps, 48kHz, stereo or multichannel audio, in .m4v, .mp4, and .mov file formats; MPEG‑4 video up to 2.5 Mbps, 640 by 480 pixels, 30 frames per second, Simple Profile with AAC‑LC audio up to 160 Kbps per channel, 48kHz, stereo audio or Dolby Audio up to 1008 Kbps, 48kHz, stereo or multichannel audio, in .m4v, .mp4, and .mov file formats; Motion JPEG (M‑JPEG) up to 35 Mbps, 1280 by 720 pixels, 30 frames per second, audio in ulaw, PCM stereo audio in .avi file format"

We hope this helps!