Point YouTube links to Invidio -- and Twitter links to Nitter
For a little more privacy: rewrite YouTube links to point to your favorite Invidious instance. Details on the „why" can be found here.
If you are using the Mouseover Popup Image Viewer (MPIV), here's the rule for the preview image:
Additionally, since version 1.1.0 (2019-09-05) also rewrites Twitter links to Nitter.Net. Reasoning is the same – and Nitter is to Twitter what Invidio.us is to YouTube.
If you don't like the pre-configured one, you can simply change it via the UserScript menu. A list of instances can be found in the Invidious Wiki, another one at instances.invidio.us.