The hosting country, like Russia, knows they are spies and puts surveillance teams on them 24/7. The spy's (aka CIA Officer) job is to make sure their agents (the host country people they are gathering intelligence from) will not be discovered because in worst case that may mean death for the agent.

I've read a few memoirs from CIA officers and typically they are doing a very well planned surveillance detection route (SDR) to ferret out who is following them. If they are headed to a clandestine meet, the plan could include disguises and specific parts of the route where they can lose the surveillance team. Then they can meet freely with their agent.

The sophistication isn't about technology of disguise, it is more about using a combination of the techniques described in the video and well honed skills.