Standard notes or Joplin have apps with versions for both phone and the desktop.
Other options:
- Markor (Android) - Syncthing - Zim (desktop)
- Orgzly (Android) - Syncthing - Emacs orgmode
If you have a Nextcloud instance, you can use QOwnNotes (desktop) and Nextcloud Notes (Android). You can also access notes on the web.
Haha, don’t remember watching anything recent. I have used all the ones I listed for a while and have settled on Markor/Zim, as I like that the most.