i usually export out of premier at 130,000k bit rate to maintian quality oin youtube.
? ? ?
In all case, Youtube re-encode your vidéo, at a level 4-5 Mbits/s.
In most case, 15 Mbits/s for H264 and 10 Mbits for H265 is sufficient for very good Youtube quality.
Not necessary to upload vidéos with a larger Mbits/s