After training this file gets saved into the respective directory:
events.out.tfevents.1589478961.19dc1442f01d
What events does this folder contain and how can I extract the information from it?
This event file records some summary data.
Reference: tensorboard/README.md at master · tensorflow/tensorboard · GitHub
But unfortunately, currently tlt docker do not support tensorboard for visualization.
Can I use that file and use it with tensorboard outside of tlt and do it my own?
Yes, you could do so. However, this only shows cost plots.