Using only 2 animes? Very different art...

[jasper-isis]

I realized after making my post that I've personally edited a video with some contrasting sources too (Mononoke, Jubei-chan, and Animatrix - but mine was action not drama, so it wasn't as big of a deal).

I guess my advice would be to give your two sources equal weight, structure your project so that the viewer doesn't forget one while the other is playing out, and be sure to sufficiently "wrap up" both. The point is to not make one source feel like it's a filler for the other.

Make a conscious effort to show similarities between the two stories. As was mentioned, being able to convey a strong overarching concept can do a lot to bridge a gap in visuals.

[Otohiko]

Hey wait, this reminded me of my close second favorite for a two-anime video:

[Castor Troy]

Example: If you were to put together an AMV that used Crayon Shin-Chan and Jin-Roh (assuming you have some sort of concrete idea that merrits this) it would be really freaking awkward.

Don't give me more crossover ideas..

[Bauzi]

I can think plenty of amvs that used three animes that failed because two of them were too similar and the third one stuck out too much.

I don´t know a particular amv that fails with only 3 animes, but I would find a lot of them on my hdd if I just look around. Most of them simply fail because of the contrasts.

So what do I suggest ya´ ?
Well first of all there must be a good concept that shows a story based connection in some kind of obvious way.

Get yourself into the great world of effects for mood-, atmosphere and colours. It can be the key for a successfull amv if you do it right. Just a matter of how good you plan it.

[Sonydjsnmix]

Thanks everyone! I regained my confidence about my amv again. After watching some examples.

structure your project so that the viewer doesn't forget one while the other is playing out, and be sure to sufficiently "wrap up" both.

I think this was one of the main problems with my video. It got so in to one anime too much and suddenly switch to the other and the change was jarring.

[Nessephanie]

Uses two shows with vastly different art styles, but solid concept and good editing make it work.

x2, this is a superb example, definitely the best one out there. It just goes straight ahead (ha ha) with the two sources pretty much playing off each other, and does it well. I'd definitely look at the way the sections are set up here, all really logical but in no way separated.

Daaaaaaaaaaaaaaaaaaaaaaw

[Kitsuner]

The VG Projects do this a lot with video games and anime, and it usually turned out pretty well.

[jasper-isis]

Multi-anime drama videos, multi-anime action videos, crossover videos, and MEPs would all be approached a bit differently in terms of pacing. I'm assuming (for some reason) that your project falls in the first category?

structure your project so that the viewer doesn't forget one while the other is playing out, and be sure to sufficiently "wrap up" both.

I think this was one of the main problems with my video. It got so in to one anime too much and suddenly switch to the other and the change was jarring.

A safe thing to do would be to keep those switches along natural shifts in the music. At least until you have both premises set up. Assuming you're using a song that has conventional structure and lyrics, you could do something like

Verse 1 - source 1
Verse 2 - source 2
Chorus - a mix of both

or...

Verse 1 - source 1
Chorus - source 1
Verse 2 - source 2
Chorus - source 2
Verse 3 - a mix of both

Or something else entirely. Whatever feels natural with the music you're using.

By the end, you want to show that the two sources are together in the same video for a reason, not just for the fact that you needed enough footage to fill up the timeline. (e.g. if it was a shared theme in the song that brought them together, then emphasize that theme.)

[JaddziaDax]

I just mix it all up lol

[Ileia]

Two animes in one video? I don't think it can be done! :O!