[I know what you're thinking. Thorcast, calm the hell down you just canon moved what are you doing. Look the film actually takes place over three days it's amazing we made it this long. Let's do a brief recount of events (you can skip the next paragraph):
Thor has been on Midgard for an incredibly long time, leaving everyone's soon to be favorite super villain as King of all of Asgard. He lied to Thor about their Dad being dead and everything was going along really well - Loki was kind of happy, he had friends on the network, things actually seemed right until Thor managed to say in a public place (Coulson's post - this will be important later) that Odin was dead (a miracle they lasted this long) and Sif of course went to ruin everything. Fastforward to Sif's last post where Loki sent the Destroyer. Thor then became Thor again, kicked it's ass and everyone road the rainbow bridge back to Asgard where Loki had just killed Laufey, the king of the Frost Giants, and was en route to destroying their entire planet. For obvious reasons, Thor goes to stop him they have a really emotional conversation and an ensuing flight but you aren't getting that as a video. That was just the background in case you were missing it.
Loki's phone flips on from where it had been dropped, and the video starts with the bifrost, Thor at the very end hammering away on it and a quick flash of green cape entering, spearthing (shut up I'm lazy) in hand.]
Forgive me, Jane.
[Suddenly, Loki jumps up towards him, aiming the spear for his back but in the same second Thor's hammer hits the Bifrost, breaking it, and the two brothers are thrown back in a brilliant flash of light. When finally anything can be seen again, Loki and Thor are both hanging off the bridge - Loki has his hand on the end of the spear, Thor grips the other end, keeping his brother from falling into the GIANT FUCKING WORMHOLE CREATED BY THE BIFROST BREAKING and Odin is holding onto Thor.
It looks like the Allfather woke up just in time!]
I could have done it, Father. [There's a sort of desperation in both his tone and his face as he says it, since clearly nothing worked out.] I could have done it. For you - for all of us.
[A pause. But instead of saying something encouraging or accepting, Odin says:]
[There's a moment's hesitation. A moment of desperation, looking for something - anything - good in this situation. That if he had only done things correctly, been more intelligent, more careful, that his father would have accepted him. Things would have worked out, and he could have been happy - a distant memory at this point, and it seems that there is no way to go back to that.
Instead: No, Loki.
It would be nice to say it was almost too much to handle, but the almost is an inaccurate qualifier. Loki lets go.]
LOKI! NO! NOOOOOOOOOOO!
[But, naturally, both Thor and Odin's words are too little too late as Loki falls away and into the abyss. The video shuts off.]