Try lowering the game resolution to 640x480, and see if that lets you go through the cutscene.
Edit the config.div file in Notepad, or other text editor, and add the line resolution switch 0
(if you add it at the end, hit Enter; the game expects the last line to be blank, and ignores it.
If you rename the cutscene video the game will skip it, which should load directly into the wastelands.
If you need to rename the file, you can check the cutscene in a Youtube let's play, etc, or there is a .bik video player available on the Rad Game Tools website
, and some media players also support the bik videos format, like PotPlayer (Korean homepage
; English downloads: here
If that doesn't help, please email firstname.lastname@example.org with your save before the Blessing Ceremony (or a Dropbox or Google drive link, etc).
Each save is a folder in the '..\SteamApps\common\divine_divinity\savegames' folder.
In Windows Explorer you can zip a file or folder by right clicking on it/them and selecting 'Send To | Compressed (zipped) Folder'.