All the instances where obsidian generates network traffic
When you open one of your notes that embeds online content. For example, an image 
Periodically check for updates (can be disabled in the settings)
When you access your Obsidian account in Settings
When you use Obsidian Sync
When you use Obsidian Publish
When you browse/download third-party themes
When you browse/download third-party plugins
If you have third party plugins enabled, there is a check, done once every 12 hours from the time the app starts up, which fetches a file hosted on GitHub we use to issue “plugin deprecations”. This file is used to remotely disable specific versions of plugins that are known to malfunction, cause data loss, or could potentially be vulnerable or malicious.
The dictionary file for each language is downloaded on first use.
The plugins you enable can also generate network traffic
Bonus:
DNS requests if a hostname needs to be resolved before establishing a connection (including DNS over HTTPS).
Not that I’m not trusting you, but I just want to brute force all supporting evidence for that. How do I check these statements, and how do I know if my checking tool is not compromised?
I wanted click-to-load for online content, instead of automatically loading remote resources like images and embeds. So I blocked the Obsidian executable in the firewall.
In the space of 8 minutes it logged 700 firewall events, outbound towards the following IP addresses:
I’m new in here and this will become my first post
I know this is an old thread but it hit the head of the nail.
I just started to use Obsidian today… and i was starting to swear as we all do more or less learning new software. LOL
Then Obsidian tried to connect to *****45c-5gol. googlevideo .com and i just looked at my firewall message and thinking… what now!!! as i haven’t written a single ink in the different notes.
as i Block all google related content as i boycotting Google as a company, no traffic went out.
Do you guys know why this is happening and is it possible to tweak some settings in Obsidian to prevent network connections unless asked for?
I have set updates to manual and i have no account and i will not get one as i dont want to sync or have any cloud solutions what so ever.
I use Debian and installed Obsidian the last version with the Deb package.