I think this already happened back in february during the chinese lockdown. I remember the google forms we were using suddenly started changing every time someone submitted a form, the data they entered would replace the field labels.
At least for streaming, most big, non-realtime, streaming platforms like YouTube or Netflix have caching inside ISP networks, to limit the requirements on the global network.
I've already noticed issues in my inner ring suburb. During the business day, my 200Mb Charter cable connection is only pulling 20-50Mb. I've never had capacity issues in the last 10 years.
