From the video BBC journalist reports from British warship as Russia “fires warning shots” - BBC News here are some screenshots and transcribed audio (mine but based on BBC's closed captions).
Discussion between The BBC's defense correspondent Jonathan Beale and Lieutenant Commander Ben Dorrington, HMS Defender:
Beale: (Narrating) HMS defender is going to sail within what Russia now claims is its territorial waters but following a legally recognized shipping lane.
(Question to Dorrington:) Would you say there's a flashpoint here in terms of how the Russians will behave?
Dorrington: There's a contentious point. Their posture will likely be more belligerent because of our proximity to what they recognize as (pause) their waters.
This apparently cautiously choreographed (by both sides) event might be somewhat staged for appearances. But I'd like to ask about how things are going on days when there are no non-Russian military ships nearby this area (within 12 nautical miles of the Crimean Peninsula (area with Cape Fiolent and Sebastopol labeled).
Question: How is Russia responding to non-military maritime traffic in the legally recognized shipping lane passing within its territorial waters off the Crimean Peninsula? Is there commercial traffic passing with (or without) permission through the 12 nautical mile limit, or is it generally staying outside to avoid confrontation? If there is regular commercial traffic within it, is Russia allowing it to pass, giving permission on a case-by-case basis, or discouraging it?
left: Screenshot from the linked video. right: Ditto but with contrast boosted a bit. click images for full size