@TeamYouTube issue signing in. i also can't sign into gmail accounts in general. idk if this is a youtube thing or google thingpic.twitter.com/qovehJPVAb
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These steps may help you regain access to your account: https://yt.be/help/nr5L . We recommend doing this from a known device and/or browser that was typically used to access the account. Here are more tips to help you through the process: https://yt.be/help/KyrL . Keep us posted!