I experience this a lot. I am an Android dev and often have to do a wide range of complex stuff and need to constantly refer to online docs and stack overflow,

I experience this a lot. I am an Android dev and often have to do a wide range of complex stuff and need to constantly refer to online docs and stack overflow, so can't stay disconnected. One of the best things for me is going to a cafe, but intentionally not taking my headphones. This strongly discourages me from watching videos, usually cafe internet is not good enough to load it. It's a soft but social barrier, taking the place of a boss. You won't want to disturb the other patrons with your youtube video audio. (rather than the hostfile trick or anything else --- if you have an addiction you'll always work around most such self-placed barriers, I know I do)