The visualization shows monthly global temperature anomalies between the years 1880 and 2022 in degrees Celsius. Temperature anomalies are deviations from a long term global average. In this case, the period 1951-1980 is used to define the baseline for the anomaly.
These temperatures are based on the NASA Goddard Institute for Space Studies (GISS) Surface Temperature Analysis (GISTEMP v4), an estimate of global surface temperature change. The data file used to create this visualization is publicly accessible here: https://data.giss.nasa.gov/gistemp/tabledata_v4/GLB.Ts+dSST.csv.
Download the video here: https://svs.gsfc.nasa.gov/5057