Accepting the “missing out” part is the hardest battle to overcome, but I like to think of it in terms of active versus passive.

There are only so many minutes during a day and every minute spent doing one thing means that is a minute not doing something else. If I have to choose how to spend one minute or sixty, I choose between active and passive activities. It’s perfectly fine to do a passive activity, but every minute spent in something passive - that is, something that does not require you to entirely engage - is a minute away from something active - that is, something that does require your full engagement.

Obviously, you can’t spend a full day on “active” activities or you would readily burn out, but life is generally more pleasurable when we engage in something active versus passive. It’s more “doing versus seeing. So, take an hour and watch something on YouTube, but make it a relaxation from a number of active activities rather than endlessly watching without getting anything else out of it.