Pretty much immediately. She squirts and the baby moves.
http://www.pornhub.com/view_video.php?vi...77f09bf0ef

This one is the best I have seen. As he is fisting her he puts his hand on her belly as the baby moves around. I came to this hard MY baby kicked. http://m.xhamster.com/movies/727861/preg...commentBox

You do realize he posted it under a thread titled, "Baby Movement During *PORNO*," right?

Ah, you're right. My mistake, I thought this thread was the other movement thread.

The whole video has belly movement! http://xtubes.org/view/video/9845608

(November 6, 2016, 2:48 am)Marky_Roberts106 The whole video has belly movement! http://xtubes.org/view/video/9845608

What video? When I click "play mp4" nothing happens and I'm not gonna download it first like it suggests.

Here's a list of all the links so far shared in this thread. I'll try to add to the list as the thread continues.

Starting around 34:40:
https://xhamster.com/movies/1772872/sexy..._sofa.html

Plenty of movement in the first half of the video:
http://www.porn.com/videos/pregnant-beau...aten-85737

This one has movement sporadically throughout the length of the video. Keep your eyes on the belly and you'll see it:
http://booloo.com/video/c0a6fc92e206a3b4...20pregnant

The movement in this one is fairly easy to spot:
http://booloo.com/video/b0147df615661103...20pregnant

You'll see a brief kick in this one at around 3:20. Don't blink or you'll miss it:
http://www.xvideos.com/video627038/germa..._be_fucked

I'm not sure if there's movement throughout this one but if there is, it's very hard to spot. BUT at the very end just after he cums on her belly there's some obvious movement:
http://www.pornhub.com/view_video.php?vi...1773118504

At 14:02 there's a brief flicker of movement. You might miss it. If anyone has a higher quality video please link it.
http://xhamster.com/movies/573766/horny_...n_a52.html

Here's another one. Check the side of her belly out at 1:30 and then again at about 1:50
http://xhamster.com/movies/2217330/pregn...tchen.html

Here's a good one. Check around 2:20
http://www.eroprofile.com/m/videos/view/prg-schw2

You can see quite a bit of movement throughout this one if you keep your eye on the belly.
The movements actually become a bit painful for her as well.
http://www.eroprofile.com/m/videos/view/prg-schw5

Not much but you see it. He mentions it while dogging her.
About 17:20
http://xhamster.com/movies/3341186/black..._mark.html

Quite a bit in this one. Especially early and mid when she starts rubbing the bump when it moves.
http://www.porn.com/videos/cute-girl-get...am-1446749

Bout 4 min in.
http://www.hotpornshow.com/watch/2591491...-toys.html

A kick at 4:27, and tiny kicks at 11:26
http://www.nuvid.com/video/192376/hub3x-net-sma462-04#

There's two little kicks to the lower belly here at 2:50. The quality sucks so it's not really worth sharing, but here it is anyway.
http://xhamster.com/movies/1866748/sexy_...016a33:e10

Movement about the 1:00 mark. Big flop about 1:22. I think there is some around 7:00. Little ones here and there. But it looks like an old VHS tape copied so the quality...
http://xhamster.com/movies/724051/highly..._toys.html

There's some good ones here at around 4:55
http://xhamster.com/movies/3980943/pregn...enona.html

Camsonic's drive of movement compilations:
https://drive.google.com/drive/folders/0...FUtdzkwaWc

Not sure if this has been posted before. Start looking around 4:00
http://www.yuvutu.com/video/845976/my-wife-pregnant-2/

Starting around 5:20, you can see the baby pushing out. Just after 5:30, she pushes the baby back with her hand. It's subtle but there.
http://www.pornhub.com/view_video.php?vi...2101673282

here you go
https://goo.gl/TkTmgf

Towards the end when she leans back. She points it out.
http://www.pornhub.com/view_video.php?vi...56c942e6e9

http://upornia.com/videos/627293/hotlitt...2:627293:1

There's definitely something sticking out of her belly in this one.
http://www.xvideos.com/video20429127/20160414_234451

Kick in between 25:30 and 25:45. She puts her had m hand where the baby moves. Not sure if there's more
http://motherless.com/050F4B6

When she lays flat on her back at around 8:10 and on
http://www.redtube.com/1627168

https://drive.google.com/folderview?id=0...1c4clEzTnM

There's not really much movement in this one, but later you can see the baby sticking out a little bit making her belly lopsided.
https://www.porndig.com/videos/39676/pre...-hard.html

Thanks for all the contributions! Keep them coming

(November 16, 2016, 2:29 pm)justeffinsayin This one has movement sporadically throughout the length of the video. Keep your eyes on the belly and you'll see it:
http://booloo.com/video/c0a6fc92e206a3b4...20pregnant

The movement in this one is fairly easy to spot:
http://booloo.com/video/b0147df615661103...20pregnant

I get "Video content not available" for these two. Does anyone have the videos?

(November 16, 2016, 2:29 pm)justeffinsayin https://drive.google.com/folderview?id=0...1c4clEzTnM

The Google Drive link doesn't work.

Unfortunately, the links listed won't last forever. If you have an opportunity to download the vids, do so.
As for booloo.com -- it's a shit website. Beyond my control to fix it.