What’s the source of that photo - an Antifa website?
The source was some YouTube video. However, I don’t know where they got it. I couldn’t find another source.
In any case, the following is from ANTIFA’s website, NYC chapter...
About us
Antifascists and Anticapitalists!
https://nycantifa.wordpress.com/about-us/
_____________________________
With the red and black anarchist signs and logos they appear to be anarco-syndicalists, a combination of communist and anarchist.
Again from their website...
_____________________________________________
Anarcho-syndicalism
A common Anarcho-Syndicalist flag.
In the early 20th century, anarcho-syndicalism arose as a distinct school of thought within anarchism.[78] With greater focus on the labour movement than previous forms of anarchism, syndicalism posits radical trade unions as a potential force for revolutionary social change, replacing capitalism and the state with a new society, democratically self-managed by the workers.
Anarcho-syndicalists seek to abolish the wage system and private ownership of the means of production, which they believe lead to class divisions. Important principles include workers' solidarity, direct action (such as general strikes and workplace recuperations), and workers' self-management. This is compatible with other branches of anarchism, and anarcho-syndicalists often subscribe to anarchist communist or collectivist anarchist economic systems.[79] Its advocates propose labour organization as a means to create the foundations of a non-hierarchical anarchist society within the current system and bring about social revolution.