  Live video commenting systems are an emerging feature of online video sites.
Recently the Chinese video sharing platform Bilibili, has popularised a novel
captioning system where user comments are displayed as streams of moving
subtitles overlaid on the video playback screen and broadcast to all viewers in
real-time. LiveBot was recently introduced as a novel Automatic Live Video
Commenting (ALVC) application. This enables the automatic generation of live
video comments from both the existing video stream and existing viewers
comments. In seeking to reproduce the baseline results reported in the original
Livebot paper, we found differences between the reproduced results using the
project codebase and the numbers reported in the paper. Further examination of
this situation suggests that this may be caused by a number of small issues in
the project code, including a non-obvious overlap between the training and test
sets. In this paper, we study these discrepancies in detail and propose an
alternative baseline implementation as a reference for other researchers in
this field.
