I've got some updates:
I created new wonders' movies, you can find them in 'middle earth' folder. You should keep that name and place it in 'Beyond the sword-->Assets-->Art-->Movies'. Yes, you read well: not in the mod assets folder but in the original one. Otherwise it won't show anythings - no one knows why. In order to make them comparing in downloaded games you should create a .exe file, which automatically copies this folder into Beyond the sword (like other mods already do, i.e. Dawn of Civilization, PaE..). I don't know if it might interest you, just try by yourself and check if worths it. Another way is to ask users to move manually this folder after downloading. Also you have to:
- Change the XML file: CIV4ArtDefines_Movie. I've uploaded the new one.
- insert the Python file CvWonderMovieScreen into Python-->Screens.
both of them has to be inserted in middle earth mod as normally.
Also, i've changed the movies of the Eras, with appropriate middle earth images. Just insert this folder in 'Middle earth (mod)-->Asset-->Art. No more changes are required, unless I would like to create a 'First Era' Movie when the game begins, but I don't know how. If you (someone) want to spend some time in, it would be nice, otherwise cancel the '03- Reinaissance' movie which is useless. Only the first two appear actually.
Finally i've changed Durin Leaderhead background to make it appear more lore-related. It's just a first trial, I might do the same with other LH if it looks nice. Just change Durin folder with the one placed in Asset-->Art-->Leaderheads. If you don't like it, feel free to come back to original one.
always in dropbox cause my pc refuses to upload rar zip 7z and so on
https://www.dropbox.com/sh/e2kdnaqeyobs0rz/AAAHv4ZVBeSfiT7LEXBe-Ehda?dl=0
I'll let you when I do though. 
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