I'm only at the 1:34 of the second video, but so far what happened is that Battler and Beatrice talk about how Battler has understood everything and has won the game. She then asks her to kill her quickly with his final blue truth as Ange is waiting for him.
So he does, but his blue truth hits Lambdadelta instead. He also hits Bernkastel. Everyone wonders what the hell he's doing so he explains that he's Anti-Witch, which also means Lambda and Bern.
Bernkastel somehow calms him down and offers to send him back to 1998. Just that he has to do one... TINY little thing..
Apparently.. he has to die!
EDIT: Something about Battler having to die? I'm not sure why, but I think it's something related to him going back. Something about choosing whether to save the Ange of his world or the Ange from 1998 who is there in the meta world with them. Anyways, Beatrice tells him to think about it carefully after he accuses Lambda and Bern of just wanting their fun. He makes the choice of going back after getting Bernkastel and Lambda to promise to help the 1998 Ange. Then the two witches kill him... by burning his corpse up. Something about 'like a roast chicken.'
After that the two witches say 'who would keep the promise to a human?' and decide on what punishment to give Beatrice. Bern says something about putting her into the worst kakera possible.
That's when Beatrice notices something on Battler's corpse... his heart!
EDIT: That shopped picture of Bernkastel slack-jawed is disturbing. 8)
So Beatrice notices his corpse and wonders if this is Battler's new Endless Magic. She encourages him to fight to come back for the sake of his little sister. Lamda and Bern laugh at her and says there's no way for a human to return to life. They kick at his corpse but Beatrice holds on to him to protect him. Then of course, Battler comes to life and the two witches are shocked.
Battler readies his blue truth at the two witches, which looks more like the Siesta's firing sequence. Battler puts it on semi-auto... etc... The witches scream that he's just a human. Battler explains that humans have magic and anti-magic all in one...
Bernkastel interrupts, promising to really help Ange of 1998 this time. Lambda chimes in that she will too. (The characterizations for these two are REALLY off here. They feel more like some Disney movie bad guys.) Bernkastel says to remember EP2 where she told him to "Fight-o!" and that she's really his ally.
Battler says his blue truth which is something about how the two witches only used Battler and Beatrice as if they were toys. The puppeteers of everything were the two witches. ... supposedly that was effective. Somehow.
EDIT: So once the two witches were destroyed the room reverts back to, I think it said some normal room or something. Battler says he's leaving but Beatrice stops him, asking if he wasn't supposed to destroy all witches, including her. He says, 'not like I know but isn't it obvious witches are supposed to be flat-chested loli girls? There's no witches like you with your huge-breasts.' <-- this is a literal translation from the last video! 8)
"So what am I then?" Asks Beatrice.
Battler says she's an alien, although Beatrice can't believe it. He then actually uses blue to say she's an alien who has use of Over-Technology and that's sufficient to explain everything. I think at this point we're supposed to be outraged at how crazy Ryukishi has gone. 8) But it's some kind of devil's proof Battler is using.
He then says if she's not satisfied maybe she can be a Time Traveller. Then they share a big laugh at the possibility. Afterwards they decided to say their last farewells. But then Battler asks her to come with him. She asks if it's ok but Battler reassures her and the two walk out of the room hand in hand. High-fructose-corn-syrupy dialogue and all.
Then it says, END.
After that, the text says, "Hello everyone, I'm Ryukishi." How do you like EP5 (apparently titled) 'absolute miracle and contract' ... 8) There's some more rubbish about how he planned for 8 episodes but decided to stop at 5. And that there's no real solution to the games, etc... his explanation, if someone thought was real, would really anger everyone since he's explaining how there can't be a solution... 8) "I said it from the start, everything in Umineko is an illusion." HEH. Fastforwarding here...
Oh, there's an omake with Ronove showing up. Ronove seems to be reporting the death of the two witches to a mysterious voice. It's revealed to be MARIA and Eva-Beatrice.. but Ronove called them Evacanti and Mariarishia. (??? the guy isn't good with Latin sounding names I guess.) So the two make fun of the defeated witches, leave Ronove to do something. One more witch from the shadows answers Ronove, anticipating a new game... and you find out at the last minute that it's... ANGE. "Should I be calling him Battler onii-san?" or something.
During the closing credits:
- Eva-B curses Battler for foiling her. Battler starts insulting her, "Hey, is that all you got? Even the goat-men were stronger."
- Every title during the credits that appears seems to be done by Ryukishi 07.
- Lambda says: "Look out Battler! I'll let you have a taste of my Certain Death magic!" Bern says: "Stop, Lambda! That's a Death Flag!"
- Battler says: "Ange, you were alive?!" Ange: "Don't call me that. I am the Witch of Conviction GRETEL. I am no longer your sister."
- Bern talks about her time as a human.. and wall of text talking about how pitiful she was... screen fades out as it continues to go...
- Ronove: "Please stop ma'am. Your magic is the same as mine; you can't defeat it." Suit-Beato: Don't underestimate me. Did you think I would be satisfied with only his (Battler's) luggage? (I assume she wants more of his pantsu.. 8) )
- There's a Special Thanks to Ryukishi07 himself!
- Ange: Why are you stopping me, Bernkastel?! Don't tell me you're going to join Battler's side? Bernkastel: Don't get the wrong idea. It's just that I can't wait for Battler to defeat anyone else first other than me.
- Special Thanks: The people watching this original (i.e. fanmade) script
- Evil Kanon: W-what is that stream of magic? Beatrice: Come forth, Cocytus the Demon Lords! (Even though Cocytus is supposed to be a river in the underworld.) Obey my command. Mercilessly strike him with the Great Hammer of the Gods! (or something) Kanon: "Nuuwaaaah!"
I don't get that last one.
There was a special thanks to BT in there too... although that seemed to have been writen before his death. That was kinda sad. And it's kinda strange how this skit
Man, some of that video was hillarious. 8)