Unable to upload videos/large files

There are no noted errors when I check the 'network' tab in the browser developer tools.  An Xfinity tech was at my home over weekend and was unable to explain.  He confirmed the upload not working and also noted extreme variations in download and upload speeds across devices and from same devices.  He had not explanation for the varied measured speeds and was going to file a ticket with his supervisor. 

Prior to leaving we tried hard LAN connection that seems to work.  Wifi issues are not solved.

Hmm, that is certainly strange user_0ysi4b. Did the technician mention the next best steps? Did they resolve the variable speed concerns?

The technician said he was having his manger put a 'watch' (or something) on my account.  The varied speeds from one time to another make no sense. I purchased cat8 cable and a 2G ethernet to use hardware.  At 8:00 AM I had 2305Mbps download and 347Mbps upload.  At 10:50 AM, same day, 153Mbps download and 296Mbps upload from the same hardware connection!

I would include screen captures of the results but don't seem to be able to copy/paste or add attachments.

NEED HELP!

Thank you so much for sharing the details of what you have completed, user_0ysi4b! We can certainly dive into the account with you and see what we can do. Can you please send us a DM to get started? 

Will you please send our team a direct message with your full name and full address?
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To send a "Direct Message" message:
• Click "Sign In" if necessary
• Click the "Direct Message" icon
• Click the "New message" (pencil and paper) icon
• Type "Xfinity Support" in the "To:" line and select "Xfinity Support" from the drop-down list which appears. The "Xfinity Support" graphic replaces the "To:" line
• Type your message in the text area near the bottom of the window
• Press Enter to send it

I have messaged the 'direct message' center.  No response as of yet.

I've still not gotten a response from Xfinity.  I've had to 2 techs come to my house and are able to confirm speeds to the house. The most recent tech stated the neighborhood upgrade to support faster uploads has not been completed.  No reasons why my speed seems to vary so much and not able to upload from wifi.  Wifi tests speeds are faster than when on port 4 with connect hardware.  Yet can only get an upload to occur from connection and not wifi.

I NEED HELP FROM COMCAST AND AM NOT GETTING ANY!

Speeds are as expected (600Mbps to 900Mbps download) one moment and 10 to 20 minutes later speeds drop to 100Mps download and 50Mbps upload.