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Try this setting (disable it!) at https://www.howtogeek.com/224981/how-to-stop-windows-10-from-uploading-updates-to-other-pcs-over-the-internet/ since it could be soaking your upload channels.
To share a peak under the hood, share the Web Speccy report. Read how at https://www.piriform.com/docs/speccy/using-speccy/publishing-a-speccy-profile-to-the-web
Im having bad upload issues ... ive done a speedtest
Heres results
Ping: 1ms
Download: 33.80mbps
Upload: 111.84KBps
Ive installed a new modem from xfinity and disconected the router because the new modem is a dualband router built-in. ....... downloading is excellent but anytime i wanna upload a video to my youtube channel i cant . It stays at 0%
Comcast cant help without sending someone out and thats a charge everytime .
Id rather try to figure this out without coming out of pocket .... thanks in advance for any ideas .

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