Issues with insertable-streams/video-processing

In Chromium Version 132.0.6834.83

https://webrtc.github.io/samples/src/content/insertable-streams/video-processing/

Open the dev console, then select "Video" in the demo page and observe the warning:

video-processing/:1 [GroupMarkerNotSet(crbug.com/242999)!:C0A02D00242C0000]Automatic fallback to software WebGL has been deprecated. Please use the --enable-unsafe-swiftshader flag to opt in to lower security guarantees for trusted content.

The default is WebGL which likely triggers the warning. WebGL creates some sort of wave distortion effect around the edges (see the trees):

If I change to canvas 2D, that probably gets ride of the webgl related error, but there is a dark border around the image:

Can you recommend a setup that will likely work? I may need to go into a custom player if I can't do that here. Thank you..