Build Streaming Content Delivery Portal

We are now consulting for a project to deliver a training portal:

1. Load videos to a cloud platform under different categories
2. Each video has four different speeds to choose from.
3. Each user is restricted to stream on only one device, ie. Netflix model
4. The videos can stream to a Desktop or IOS or Android mobile app.

An example of such a product would be - https://www.rightbraineducationlibrary.com/free-baby-flashcards

Please specify the frontend and backend technology stack, and state the preferred cloud platform you work with.

Providing example(s) of your past works similar to this project would help us in shortlisting.

Do send your questions to clarify the scope if needed.

The budget we put up is not restrictive; we would like you to provide the estimate. Thank you.