The new video has new footage of Shikanosuke and Matabee as well as a lot of little hints so I'm going to watch it more after work. It looks as though Sasuke's Basara-e Giga Basara artwork is a group of monkeys with the two-character title sarumai ('monkey dance'). I talked about Yukimura's already.
I'm not entirely sure what's going on in the Toyotomi one. Hideyoshi's picture appears to be his usual gourd (which I didn't see at all until Balder mentioned it) and the ink splashing from it resembles a map of Japan. The detail in Hanbee's image on the right is difficult to make out but it must be a reference to Inabayama Castle. Anyway, Hideyoshi's two-character description in the middle of the picture is taikou, one of his real-life titles, while Hanbee's seems to be shichisho ('seven writings') which I believe refers to the seven military classics he was said to have mastered.
The video also shows a new female-only formation: Nadeshiko Gyorin ('Carnation Fish Scales').
Lastly, the official cover art is now confirmed below and the final Sengoku Basara Eiyuu No Kai fan club newsletter is shipping. There's a lot of new information to digest.
Coverage is available from Famitsu, 4Gamer, Dengeki and Gamer.