To get rid of the annoying YouTube message (ad blocker are not allowed on Youtube) use this custom filter in uBlock extension
- Open uBlock extension dashboard
- Open my filters tab
- Copy & Paste this code into my filter
- Apply changes and close all tabs
via: enderman
DDNS won't save you from your ISP sticking your modem behind a cgnat and blocking critical ports. Which is not an uncommon scenario at all.
There are ways around it, but it's still not very straightforward. Also often with some significant limitations.