You set OBS to STREAM at 4500, record at Indistinguishable, which is a CRF mode that doesn't use a set bitrate. Windows also doesn't properly report the bitrate of variable bitrate videos, your bitrate will be upwards of 200000Kbps (200Mbps) at times, you need MediaInfo to see this.
Set Recording to "Same as Stream", if you want to record at stream settings.