Animation from Separate File
This example shows how to load an animation for a model, but from a separate file.
The model and animation were downloaded separately from Mixamo.
The animation was exported after matching it to this specific model using the Mixamo UI.
If you don't match the animation that you export, from the same model before downloading, then there is a greater change that the transforms within the animation, or the skeleton bone references will not match the model.
It is common to export a model with animation included within the model file, but in this case, the model and animation are separate files.