phrase meaning - 1 hour ago though it is already about 110 minutes

I tried a small experiment. I posted a post on Facebook at exactly: 21:01 and waited to see how many hours ago it will say. When it was 22:50 it still said that my post was posted 1 hour ago.

Though some days back on this forum some people told me that when something started at 21:01 and it is 22:50 that I should say it started 2 hours ago.

So whom should I trust now?

All social networks like Facebook, Instagram and YouTube etc. use the system where it would say 1 hour ago even if it was 119 minutes already, so meaning they will never say it was 2 hours ago unless at least 120 minutes passed.

This was the way I used to express 1 hour ago as well. However, since I heard the answers from many other people I feel unsure about it right now...

I am talking about casual speech with friends etc. In such scenario. What would you say? 1 or 2 hours ago? Is Facebook/YouTube/Instagram wrong or?

• if we decide to agree on the theory that if it is more than 1 hour and 40 minutes it is a good idea to round to 2 hours ago.

So what time span would you imagine if something happened let say 10:10, now it is 11:50.

If somebody said to me that something happened 2 hours ago and I looked on time saying 11:50 I would image that it happened some time between. (9:30-9:50)

That is why it feels so weird for me to say 2 hours ago thought it has not been more two hours yet.

I dont know why but more logical for me it feels to say 1 hour ago though it can already be more than 100 minutes and still just say that it happened an hour ago when talking with friends, teachers, whoever in casual speech unless it is something super important i would say exactly hours and minutes.

How do you say it in your life? How do you express time in such situations? Do you express time the same way as Facebook or?

I know that some of you may think this is some kind of joke, unfortunately it is not and I am going crazy and depressed without knowing system for this... It has been already 2 months and I still feel overwhelmed with this ideas and questions... I cannot help myself, please help me, please.

Thanks for your help.