Follow this file path to find where the videos are located:
Local Disk (C:)
Program Files (x86)
Steam
steamapps
common
Wildlands
videos

You have now located the video files:
Nvidia.bk2 (this is the nvidia logo video)
Ubisoft_Logo.bk2 (this is the ubisoft logo video)

Now, all you need to do is rename them. I just put an exclamation mark on the end of the file name so I can easily see which files I have edited in case I want them back (which I probably won't)

Now you have removed the annoying ubisoft and nvidia intros from the game. But we can rename some more files to speed up the start of the game.

Next, you can get rid of those cutscenes that always play when starting up the game. Sure, you can hold ESC to skip, but it is better if they just don't appear at all. Rename the files VIDEO_EXPERIENCE.bk2 for the Operation Kingslayer intro, VIDEO_GLOBA_000.bk2 for the Sueno intro and VIDEO_INTRO_GAM.bk2 for the Santa Blanca intro.

Finally, you can rename 2 more files. Go into the folder called TRC. You will now see a lot of folders of different languages. Choose the folder for your language. You can rename the file Epilepsy.bk2 so it gets removed. (If you do actually have epilepsy make sure you are aware of the warning.) You can also rename WarningSaving.bk2 to remove the intro that tells you what the save icon looks like.

(PS, when the game gets an update or if you redownload the game, these files will go back to their default names, so you will have to rename them again.)

Thank you for reading my guide. If you found it helpful, please like and/or favourite the guide! I find it quite annoying to sit through all these intros and removing them definitely makes the game start up faster.