No it isn’t. This is false information. The Geneva convention makes no provision for photographing/videography of POW. The section that touches on it states:
"... prisoners of war must at all times be protected, particularly against acts of violence or intimidation and against insults and public curiosity."
This has been interpreted to mean that they shouldn’t be shown in humiliating or insulting circumstances. It certainly doesn’t ban all pictures of prisoners, it is completely dependent on the context.
Finally, what do you think should be done when someone breaks the Geneva convention?
Article 14 says that they are entitled in all circumstances
"to respect for their persons and their honour."
You think by being paraded to the world as a prisoner, which by any reasoning is a rather degrading position to be in, is respecting their person and their honour?
Zero context needed, pretty clear cut in black and white.
As for what should be done, personally and I kniw it is not an opinion shared, I would say that anyone convicted of breaking the conventions, or convicted of war crimes of any kind, is punishable by death.