Moving Some Content From Page A to Page B

[khi5]

Page A has written content, pictures, videos.

The written content from Page A is being moved to Page B. When Google crawls the pages next time around will Page B receive the content credit? Will there not be any issues that this content originally belonged to Page A?

Page A is not a page I want to rank for (just have great pictures and videos for users). Can I 301 redirect from Page A to B since the written content from A has been deleted or no need? Again, I intent to keep Page A live because good value for users to see pictures and videos.

[Whittie]

If you have no longer need for Page A, as the content will now be on Page B then a 301 redirect will / should take across any 'link juice'.
Take a look at this; http://moz.com/learn/seo/redirection

If you need Page A & B, is there a different URL you could use?

[artdivision]

You mention in your title "some content" and then on your text that you move a whole page. Are you moving the whole content? if so what is the point moving it to a new page and not optimising the old page around the additional content?

If you move "some content" 301 is not the best solution as you eliminate the original page with the other half content. 
If you move page A to page B and page B has already its own content with Page A content being a nice complimentary addition to the whole then do what Whittie says and set a 301.

Good luck!

[gfiorelli1]

If Page A is there just for the users during navigation on-site, but you don't care of having it ranking and you fear to fall into duplicated content issues, then why don't you simply noindex it via meta robots?

[danwebman]

Just add the following to the top of your video page, as Gianluca suggested. However I would make it NOINDEX, FOLLOW.

[khi5]

Gianluca, thx. Question: Page A's written content is now on page B. Page A has lots of great pictures and I imagine Google seeing I have a lot of pages with pictures (just like Page A) it would make sense to keep indexed even though I do not expect any traffic from search. Since the written content is no longer on Page A, am I not guaranteed Page B will receive the SEO credit for the written content when Google crawls again? Or, are you implying I need to place a noindex on Page A in order to increase chance Page B gets the SEO credit since the content originally was placed o  Page A (though it ia no longer there, so no duplicate content here).

[khi5]

The bigger issue is I would like to add pictures to Page B (delete from Page A) but that would make Page B too heavy loading. So, I wanted to create it so pictures (if moved to Page B) only loads if users scroll down the page. However, in this way I cant get Google to index all those pictures. Or, is there a way to have pictures only load after users scroll, yet all pictures are indexed by Google?

[gfiorelli1]

You can solve the page speed issues using CDN for the images and using scripts that upload images only when needed, as saying when people is scrolling down and the image must appear (sorry I cannot remember the name of that Javascript right now :(( )

[gfiorelli1]

If you don't really need to discover new pages, then it is better to use just "noindex".

[khi5]

but as long as I have a lot of great pictures indexed by Google wouldn't it be a waste to noindex such pages, even though I do not care about ranking for those pages? In other words, if I have "noindex, follow" wouldn't that mean Google will not count all the pictures on such pages and that could ultimately hurt more important pages on my site? I want to move these pictures to other page where the pictures do not load before users scroll. I will share with my web developers what you mentioned above. If you can think what the javascript is please do keep me posted