GoKawiilExplainer details why USB-C to HDMI adapters often fail to deliver full video quality
A technology explainer outlines how USB-C to HDMI adapters work, noting that video output depends on a USB-C port supporting DisplayPort Alternate Mode or Thunderbolt, a fully-featured cable capable of carrying video signals, and an adapter with a chip to convert the signal into HDMI. It notes that DisplayPort 1.4 supports up to 8K at 60Hz while DisplayPort 1.2 tops out at 4K at 60Hz, and that basic charging cables cannot transmit video at all.