Getting hit with a lot of robo checks

Recently a lot of websites like YouTube and google have been saying something about suspicious traffic. YouTube wants be to login to confirm I'm not a bot despite already being logged in and google usually goes away after a couple refreshes or a recaptcha.

For the most part google hasn't bothered me but YouTube is a recent symptom. If I had something generating weird network traffic what's the easiest way to diagnose it? I'm not really fluent enough in wireshark to understand what I'm looking for.