WebGL / Three.js Animation Viewer and Library

I'm looking to extend a WebGL/[login to view URL] implementation of an animation viewer that we've generated: [login to view URL] This example uses a model from our full body 3D scanner that was auto-rigged, then exported as a DAE with a Mixamo-based skeleton (25-bone). I'd like to have a UI created for this viewer that allows the selection from *many* animations that are sourced from an open-source/free/cheap commercial use library. I'll need you to find the animation library and integrate it. I'm hoping for a minimum of 25 animation options -- they can be 3 seconds or longer (goal is to make them fun to flip through/fun to share). The viewer will need to download the animations on-the-fly when selected (we can't load the animations until the user selects them, as we want to keep the load time nice and quick -- the goal is to reduce load time and lag on slower/older devices on bad connections). I'd also like to have a button that takes a screenshot and triggers a JPG download of that screenshot rendered from the viewer, as well as a button that can be pressed and held to record a video of the render which would trigger an MP4 download of that video upon release (a loading/processing popup while it is prepared is totally fine too). Eventually, I'd also like to add a logo overlay (essentially a watermark) that shows up on the top right corner of the viewer in the screenshots/videos as well. I hope the above is descriptive enough - if it is not, please feel free to reach out to me via a private message. I'm hoping this is a relatively simple implementation for someone who has [login to view URL] experience and works with 3D models/WebGL regularly, and that the major challenge will be finding a library of animations to use with the model that are commercially viable that we have the ability to use for free or license at a reasonably low cost. The deliverable for this will be a lightweight Three.js-based HTML/CSS/Javascript package that we can run locally. The deliverable *must be your own work* and *must be usable commercially without purchasing any additional licenses* (e.g. please just use [login to view URL] in its bare form and do not use anyone else's functions unless you can link to their license and it is acceptable for commercial use). I look forward to working with you :)