[First thing first] [REQUIREMENTS]

 

You MUST be using OpenMw engine or Morrowind Code Patch 1.9+ by Hrnchamd and have "High-def cutscene support" enabled. Full HD means 1920 x 1080 pixels, original Morrowind with this mod will crash on startup!
For low-spec machines: I was trying this mod on Macbook Air 2009 (Core 2 Duo 2.3 GHz), it's stuttering a bit but summary it's OK, it's not lagging.
I installed TES Legends to try and inspect resourses. Not a lot movies are about Morrowind, but I found few. I decided not to add Sota Sil and Clockwork City related movies because their design is much different from TES III. Fortunately design of Dagoth Ur and Tribunal creatures (fabricants) is very close to original Morrowind.
I couldn't find this movie scenes on YouTube to add preview so will add only screenshots, to record a screencast is too much for my 2009 Air.

[COOL TIP]

Rename mw_menu.bik to menu_background.bik in original "Data Files\Video" folder, launch the game and inspect original animated menu as it was design, I don't know why this file named improperly and never used. If you got no "Data Files\Video" folder, copy it from CD.

[Installation]

1. Back up 2 files:
Data Files\Video\mw_logo.bik (it's not suitable to my mod)
Data Files\Music\Special\morrowind title.mp3 (original main menu music)
2. Extract archive anywhere
3. Copy "Video" to "Morrowind\Data Files\"
4. Choose one of main menu replacements. Fastest way -- drag and drop folder "! Choose a music replacement !" to media player, do not browse inside -- there are a lot subfolders.
5. Copy one of choosen "morrowind title.mp3" to Data Files\Music\Special folder.

[UNINTSALATION]

Return back backuped files:
Data Files\Video\mw_logo.bik
Data Files\Music\Special\morrowind title.mp3
and delete this:
Data Files\Video\menu_background.bik

[CREDITS]

00. For cinematic scenes: credits goes to Bethesda Softworks and Direwolf Digital.

I was choosing great music replacements to fit my mod tand to be sad, doomed and majestic and epic in the same time. So there authors:

01. strikr901, mod name NLS Morrowind Title 1-42993-1-0
https://www.nexusmods.com/morrowind/mods/42993

02. Taggart Moss - Hope of Vvardenfell (ESO Morrowind Fanmade Music)
https://www.youtube.com/watch?v=n9LG8C4Dhpo

03. TES Legens - Houses of Morrowind Theme
https://www.youtube.com/watch?v=mUqOTpJQ9Bw
Music owned by Bethesda Softworks and Direwolf Digital

04. TES Online Morrowind Theme -- A Land of War and Poetry 
Brad Derric feat. J. Soule, owned by Bethesda
https://www.youtube.com/watch?v=iygncKS6cZY&t=163s

5. TES VI - Volenfell Main Theme (Unofficial) by Caden Welborn
https://www.youtube.com/watch?v=f64BjNni2po

[RECOMENDED MODS]

Happy to present this amazing (for me) mod with additional Dunmeri male voice actings:
IDLE TALK by Von Djangos
https://www.nexusmods.com/morrowind/mods/46948
Significant part of the population of Vvardenfell are male Dunmers so this mod adds much diversity to their voiced greetings or comments.

My previous animated menu mod copiyng TES Online Morrowind Main Menu & Music, and Baar Dau above Vivec cinematic scene:
https://www.nexusmods.com/morrowind/mods/46175?tab=posts&BH=0