They're arresting people for sharing the video along with encouraging comments. They aren't arresting journalists for showing clips.

Shouting "FIRE" in a crowded theatre has always been illegal.

As I mentioned further up the thread, it was illegal for about 50 years in the US as a hypothetical but it’s no longer a legitimate legal standard. Shouting fire in a crowded theater isn’t illegal (at least, it isn’t not free speech). See Brandenburg v. Ohio and how it overruled the prior Schenk standard.

Today's illegal speech must incite "imminent lawless action." It could be argued that sharing the video fails that standard. Probably wouldn't fly in the US, but we're not talking about the US.

Would you hold a different view if this were people sharing an ISIS recruitment video? If so, why?

No, share it all, let the information run free