During Kirk's torture scenes, the back shots have Shatner's arms stretched wide apart and yanked straight - the front shots have the chains going overhead and his arms are bent at the elbows.
Spock claims the Vian device they capture is operated by specific brain patterns and sets it to his own. At the end Kirk hands it back to the Vian and they instantly use it to heal McCoy without adjustment.
Although Kirk said back in "The Menagerie" that starships don't have elaborate zoom & pan recording logs - apparently small research bases do because when Spock plays back the log of the two scientists the automatic recording pans and zooms like a pro.
The Vians are very neat - they take Kirk's shirt off when they torture him and put it back on when they're done.