Symbol 5529A from IEC 60417 - Title/Meaning: Video output Function/description: To identify video equipment output controls and connecting terminals.[]This symbol applies also when an audio signal is included.
Additional information: 
To qualify this symbol, symbols such as 5048, the analogue sign or the digital sign may be added, in accordance with the user's documentation.
The outline of the symbol may be interrupted at the exit of the signal as shown in 5529B
Published in: Supplement M, 1994
Own work using: iso.org/obp/graphics/grs/e1659ea1-258b-4e6e-9bf7-fd74ca63d499 200.png
Vectorization:  Mrmw