External Script Requirements: You may not need all these scripts, depending on the WebRTCAdaptor's requirements and your specific implementation:
    jQuery: If you're not directly using jQuery in your code or WebRTCAdaptor doesn’t depend on it, you can skip this include.
    Adapter-latest.js: This is usually for WebRTC support in older browsers, so if you're targeting modern browsers, you might not need it. However, WebRTC libraries sometimes rely on it to handle cross-browser WebRTC differences.
    Notify.js: This script enables notifications, so if you don’t specifically call notify() functions, you should be able to remove it.

The error about "Video sender not found to change bandwidth" might be an unrelated issue, possibly tied to how the WebRTCAdaptor manages connection state changes, especially if a connection fails or drops. Verify if the connection to your video stream has any issues with initialization or bandwidth.

Hosting WebRTCAdaptor Locally: Yes, you can host a local copy of webrtc_adaptor.js by downloading the file and referencing it as import { WebRTCAdaptor } from "./js/webrtc_adaptor.js";. This gives you full control over its version and eliminates external dependency, but remember that it may not update automatically if the library is updated on Skypack.