Symbol 5633 from IEC 60417 - Title/Meaning: Three component video input Function/description: To identify controls and connecting terminals specifically meant for three component video input.
Additional information: 
The type of signal may be indicated above the arrow as shown in symbols 5633-1 and 5633-2
Published in: Supplement O, 1996,3C/293/DIS
Own work using: iso.org/obp/graphics/grs/8bb96a85-801a-45e9-a73a-323be57b4d1d 200.png
Vectorization:  Mrmw