Actually, Broken Sword I & II aren't free downloads; the downloads on ScummVM's pages contain the games' cutscenes transcoded from Bink Video to MPEG2.
It turns out that unlike many of the technologies ScummVM reverse-engineers and reimplements, the Bink video codec is still commercially available, and the Bink people refused to let ScummVM release their reverse-enigneered decoder. So, if you want cutscenes in Broken Sword games, you need to download them in a format that ScummVM can decode.
You can also download Flight of the Amazon Queen, Dreamweb, Drascula and Slotys (from other editors).
At least one Revolution programmer is also a ScummVM contributor, BTW.
http://www.scummvm.org/downloads/#extras