Our Particles Alpha Blended template allows you to set up an Anim Alpha Blend shader, you can achieve it by following the instructions in the video that you've shared. On ASE's side, I'm sharing an example that should serve as a good starting point:
Do note that you need to be careful on passing the Custom Vertex Streams' values correctly into the Texture Sample, as exemplified in the first screenshot.
Have you had the chance to rate and review Amplify Shader Editor? It would be awesome if you could share your experience with the Unity community, your feedback is extremely valuable to us!
Feel free to get back in touch if you have further issues or questions, thanks!