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Glorfindel
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This image is know as test card (or test pattern) and was originally used as a TV test signal. Before 24/7 TV, it was typically shown when the regular broadcast ended. In its beginning it used to be physical test cards at which the camera was pointed and was later replaced by a digital version.

See Wikipedia for more context.

In Youtube'sYouTube's case, I can't really see any value other than an homage to the earlier days of video broadcasting.

enter image description here

This image is know as test card (or test pattern) and was originally used as a TV test signal. Before 24/7 TV, it was typically shown when the regular broadcast ended. In its beginning it used to be physical test cards at which the camera was pointed and was later replaced by a digital version.

See Wikipedia for more context.

In Youtube's case, I can't really see any value other than an homage to the earlier days of video broadcasting.

enter image description here

This image is know as test card (or test pattern) and was originally used as a TV test signal. Before 24/7 TV, it was typically shown when the regular broadcast ended. In its beginning it used to be physical test cards at which the camera was pointed and was later replaced by a digital version.

See Wikipedia for more context.

In YouTube's case, I can't really see any value other than an homage to the earlier days of video broadcasting.

enter image description here

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greenforest
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This image is know as test card (or test pattern) and was originally used as a TV test signal. Before 24/7 TV, it was typically shown when the regular broadcast ended. In its beginning it used to be physical test cards at which the camera was pointed and was later replaced by a digital version.

See Wikipedia for more context.

In Youtube's case, I can't really see any value other than an homage to the earlier days of video broadcasting.

enter image description here