How should I handle an error if the video cannot be loaded. I have modified a playground with wrong video url and if you see in the console it throws an error. https://playground.babylonjs.com/#ZMCFYA#127
As you found out - there is no way to react to errors when loading a video the babylon way. If you want to create a github issue we will be happy to add an onError observable to the video texture to make sure errors are passed to the dev correctly.
In the meantime, you can always check for errors on the native video element: