It's probably ok but you could look at the source data and be more specific, averages and base indexes can play tricks on the visualization. From the video:

https://data.giss.nasa.gov/gisstemp

Data source NASA GISS, GISTEMP Land-Ocean Temprature Index (LOTI), ERSSTv5, 12000km square smoothing.

Average of monthly temprature anaomolies. GISTEMP base period 1951-1980.