HIKVISION Digital Video Recorder User Manual page 89

You can play back record files of multi-channel reversely. Up to 16-ch (with 1920*1080 resolution)
simultaneous reverse playback is supported.
Steps:
1. Enter Playback interface.
Menu>Playback
2. Check more than one checkboxes to select multiple channels and click to select a date on the calendar.
Figure 6. 27 4-ch Synchronous Playback Interface
3. Click to play back the record files reversely.
User Manual of Digital Video Recorder
89