How many hours do you work a day on your PhD? I’m making a video

Hi everyone, recently I posted a YouTube video showing a realistic day in my life as a PhD student. While I was recording the video I got curious to know how different days in PhD students' lives are depending on the field of study. I got especially curious about how many hours a week you work depending on the field of the PhD that you are getting. I would like to make another video compiling all the responses so I was just wondering y’all can send your answers to help me have more data (I think it would be better if yall just leave a comment on the video so I don’t have data on both places (Reddit and YouTube). Thank you so much and good luck with your program! WOOHOO YOU GOT THIS!

Link: https://youtu.be/Aek6GQmgDXY?si=dWeo1hl-7HrpAC1N