I wanted to check out the service in the OP’s post, and realized I didn’t have an iOS based RSS reader app on my tablet. In line with your privacy concerns, I wanted an app that didn’t require creating an account. I couldn’t find one in the first several I loaded. Any tips?

None of the first few apps that show up for me in the iOS store need accounts. I've used Reeder in the past. But now I use NetNewsReader which is free and available on github.

https://apps.apple.com/us/app/netnewswire-rss-reader/id14806...

Is it normal in iOS-land to need to register to use apps?

Is it worth duplicating the fb specific parts of your website at another web address as a test site, so that If it was similarly affected, you could provide the address info to help troubleshoot?

The double hit videos such as https://billiards.colostate.edu/high-speed-video/hsv-b-6/

Are very useful for understanding fouls.