That was mentioned in the video, directly after he explains how the samples are controlled in the MRQ, he says and shows, that you should set the Antialiasing to “None”. Timestamp 23:54.
Thats also written in the online documentation, in the section about MRQs anti aliasing settings:
- From the Movie Render Queue window, click the Unsaved Config* link to open the settings. (The ***** indicates that these settings have not yet been saved. You will save the presets once all settings have been entered.)
- On the Setting/Presets window, click Anti-aliasing to open a settings dialog.
- Add the following values:
- Spatial Sample Count: 1
- Temporal Sample Count: 64
- Override Anti Aliasing Mode: Enabled
- Anti Aliasing Method: None
- Render Warm Up Count: 120
- Engine Warm Up Count: 120
