Closer Look was the name of a series of short behind-the-scenes documentaries that accompanied the release of each episode of series 11 of Doctor Who. It was effectively the successor to Inside Look, the similar series that had been a part of the late Steven Moffat era. Thus, it was an abbreviated version of Doctor Who Confidential.
Individual episodes were not titled on screen. The name is derived solely from the iTunes captions of each episode's thumbnail.
Like some episodes of Inside Look, the programme sometimes had episodes with significantly different content, depending upon the venue. For example, the episode which accompanied The Woman Who Fell to Earth was radically different in its Fathom Events/BBCA theatrical form than it was in the much shorter form it had as a part of the iTunes subscription to series 11.