OK, have I ever taken a photo during Mass? Yes, I have, but I also try to do so discreetly, and not flaunt my cell phone or camera my head. Pope Francis has a point. So many times when we should see hands held high in praise of our Lord - we see cell phones held high, snapping pictures or taking videos. Like Pope Francis said, "the Mass is not a show, it is to go and meet the passion and resurrection of our Lord."
Now, I can understand if you're in an historic church and you want to get a picture documenting your trip - but we should refrain from doing so during Mass. Take a picture or two before or after Mass, but during Mass - remember why you are there. If you really want a video of the Mass, there are hundreds of places you can get those. No, it likely will not be THE Mass which you participated in, but it will be the Mass in that same church - and the video was taken discreetly and professionally (and likely not as shaky or out of focus as cell phone videos often are!).
Will you go to hell if you take pictures during Mass? No, not likely, at least not for that reason. However, if your actions are distracting and perhaps even causing another to sin (because now they are angry you for the distraction). In that way, you may be a near occasion of sin for others - which may be a sin for yourself - especially if you are knowingly distracting and/or continue after someone makes you aware of the distraction you're causing.
Article from Catholic Apps: https://catholicapptitude.org/2017/11/16/pope-francis-no-photography-during-mass-please/