What do these announcements mean? (Youtube video)

[NGT6 1315]

Afternoon,

 

as I do not really have any significant knowledge of Japanese - could any of you who have such knowledge tell me what the announcements in the following video from the Yamanote line mean?

 

 

Thanks!

[bikkuri bahn]

They're just announcements by a platform staff member(s), telling the doors will close soon and the train will depart, and near the end, he tells people to not rush onto the train but rather take the next train. The garbled announcement shortly after the train departs I can't make out, but I suspect it's a "gyomu renraku", or announcement intended for staff only.  After that train departure, there's an ATOS (automated) announcement of arrival of a train on platform 15 along with a warning to stand behind the yellow line, followed by a station staff announcement repeating the same.

[NGT6 1315]

They're just announcements by a platform staff member(s), telling the doors will close soon and the train will depart, and near the end, he tells people to not rush onto the train but rather take the next train. The garbled announcement shortly after the train departs I can't make out, but I suspect it's a "gyomu renraku", or announcement intended for staff only.  After that train departure, there's an ATOS (automated) announcement of arrival of a train on platform 15 along with a warning to stand behind the yellow line, followed by a station staff announcement repeating the same.

 

Thank you very much!

 

Having looked at several videos like this one, I was having the impression that there generally seem to be plenty of these announcements at Japanese stations - those in urban areas at least. I also noticed the coexistence of automated and staff announcements, and while I never understood what exactly was being said, I did have the impression that many of the staff announcements essentially had the same content as the ATOS ones. Is this just to make sure that all passengers are getting the message, and thus perhaps indicative of them not really paying attention to automated announcements specifically?

[bikkuri bahn]

Is this just to make sure that all passengers are getting the message, and thus perhaps indicative of them not really paying attention to automated announcements specifically?

 

Yes, basically.  You get a lot of platform staff announcements in the busier urban stations, especially in the rush hour when you have the big crowds, and the trains are running on 2~3 minute headways.  Even 5 second delays to departure can affect the working timetable.  So you want staff to shepherd passengers quickly onto the trains, and warn off those who are cutting it too close, possibly resulting in injury and disruption to the schedule.