I'm sorry, I didn't mean to go on so long..
If you want to skip the introduction, you can go to 12:40.

言うは知性、言わぬは品性
Iuwachisei, iwanuhahinsei

武士の情け
Bushi no nasake
これまで武士の情けで言わなかった事があるが、
もう我慢できない。全部言ってしまう。
This means you've been endured for a while because of 武士の情け, but you can't stand it anymore, or your tempers boiled over.. (Probably)

相手の気持を慮る
Aiteno kimochiwo omonpakaru
配慮する
Hairyo suru

I'd appreciate it you could let me know if there are some mistakes regarding my understanding or if you do have more understandable explanations!

Thank you very much for watching.
Have a good day.