CTR (Click-Through Rate)
CTR is the percentage of people who click a video after seeing its thumbnail and title (impression).
CTR mainly reflects packaging — thumbnail and title. Typical values sit around 2–10%, but a “good” CTR depends on how a video is being surfaced. Very high CTR with low retention can signal misleading packaging.
Formula
CTR = (clicks ÷ impressions) × 100
Related tool: Thumbnail Preview Tester