WebBased application for animations creating

I state that we are NOT a company that works with graphics or graphics tools or animation tools.
The goal is sharing corporate messages.

I would like to create a template (or more than one) of animations (MP4/AVI) that allows me to manage corporate messages.
See the attached examples.

These are based on components variable:
- a background animation
- free text organized in different areas
- references for contacts

After creating this template, I must to be able to modify the message, the background animation, the texts, ... without having to do any major work.

Surely, it possible to re-use a free code, available online (ASP/PHP).
There should be no license fees to add.

----- Environment -----
The application will work into an intranet (no internet access) and access will be allowed only for users inside the same LAN.
Web-server is IIS10.


----- Costs and quality -----
Please pay attention on application performances.
No upfront. No payment before successful completion of all tests. Source-code required for test
Unnecessary images, files, libraries, ... must be removed.


----- Timing -----
Proposals from programmers who do several activities in parallel will not be accepted: the quality of work could be low.
Start as soon as possible - daily update is requested (showing progress), to avoid time loss and misunderstandings about requirements