Symbol 5526 from IEC 60417 - Title/Meaning: Colour video input Function/description: To identify controls and connecting terminals specifically meant for colour video input.
Additional information: 
The type of signal may be indicated above the arrow as shown in symbols 5526-1 and 5526-2
Published in: Supplement O, 1996,3C/293/DIS
Own work using: iso.org/obp/graphics/grs/5b0cb504-e774-4e50-8417-8dca68f1d52f 200.png
Vectorization:  Mrmw