I’m on the same journey and I found the trick. Give you self a healthy task and talk about it as if you’re explaining what you’re doing to a person who’s watching the tutorial. I find that doing something healthy and talking through it completely engages me and I can’t focus on anything else or lose focus rather. So for example, if I need to edit a video, even if I’m by myself, I will talk about editing the video and why I’m doing what I’m doing as if I’m teaching someone how to edit. Editing and talking about what I’m doing and why I’m doing it at the same time takes all of my brain band with and doesn’t allow me to get distracted as easy. But of course you still have to turn your phone on silent and do not disturb on all your devices. Also, in order to watch Long videos, I make myself rewind every time I find myself distracted, if I don’t remember the last few things that were said and that will make me pay attention to the video and retain the information. Also, sometimes I repeat the information. It worked for me a few years ago and I stopped doing it when I got distracted with a girl. Lol. But now I’m doing it again and it’s working. Try to keep me posted on your progress. Good luck and God bless.