ClipNook
Your personal send-to-myself inbox for everything worth keeping.
or
Everything you save stays private to your account.
Browser extension
Add a Save to ClipNook button on YouTube, TikTok, Instagram and Facebook (desktop Chrome & Firefox Android)
How to install
Unzip the file, open chrome://extensions (or about:debugging in Firefox), enable Developer mode, then Load unpacked and select the unzipped folder.