Cool,
I am currently investigating the translation of YouTube subtitles to other languages. Hopefully I can find an automated way to do it rather than translate word for word.
Here is the language contribution link to my channel, let me know if you have any ideas.

http://www.youtube.com/timedtext_cs_panel?c=UCp6x8JP7oCiiTjbJorPPMsQ&tab=2

Hi peeniewally
Have a look at this video on nodes to move camera:
https://youtu.be/i5EWCOuxMjQ
In addition to the nodes in this video, there are now more nodes to change the camera navigation style.
For more getting-started videos, check out my other videos and also look at Ian's video channel. He has tons of great videos on Blender and Blend4Web:
https://www.youtube.com/user/ianscott888/videos

Have a look in your SDK at the Cartoon Interior project: Blend4web_sdk/apps_dev/tutorials/cartoon_interior/cartoon_interior.html.

Or online here: https://www.blend4web.com/apps/tutorials/cartoon_interior/cartoon_interior.html
This projects loads a scene and then loads JSON file objects as the user clicks buttons. So each JSON object was exported from its own Blender file.

Hope that helps.

I know VR is still experimental but are there things that work differently in VR? For example do applied textures and materials work the same? I am just wondering if there are things I should consider when developing for VR.

Maybe you could include a few details. Is the problem only occurring on one PC? Is this a simple HTML export? You can attach your .blend file with the 'Attach' button down at the lower left. Before you attach, save external data by going to File > External Data > Check 'Automatically Pack into .blend'

It is possible. I recommend have a look at the Made With Page. I imagine you might want physics to work on particles? I had a chance to play with the Blend4Web physics personally in VR (Video here). For a browser based 3D web application, I don't think you will find anything close to Blend4Web.
Take a look at this video by Ian, it has physics (bowling): https://www.youtube.com/watch?v=XPudv8NapGg
Ian has a number of other videos on his channel that will help you get into the coding.

Have a look at the Community Edition information.
Basically you can do what you want if your project is open source. If you want a closed source solution, you need the Pro version. The pro version also comes with a lot more cool assets

I think what you are talking about is using HTML elements to texture a 3D object. I think the closest you will come to that is custom anchors which give you the ability to apply customized HTML tags to objects but they are not applied as textures.
Ian has a great video on this: https://www.youtube.com/watch?v=GtrsMEh5VNI

Awesome, thanks. I am working on a mixed reality studio that has a second virtual camera perspective composited with the real person in the VR experience, This is being done in VR gaming but I think there is a way to do it with the Chromium VR ready browser. If I get it working I will do the Blend4Web VR demo with it.

If you use two separate videos as textures, they may not sync perfectly. But if you composite your two perspectives into one video file you could map two planes to each perspective on the video. Or if your size was right on your video file, you could map one plane to the video that would than have both perspectives on it.
Video texture documentation.
If you haven't already, take a look at the code snippet in your SDK:
(With Blender and your local server running)
http://localhost:6687/apps_dev/code_snippets/code_snippets.html?scene=canvas_texture

P.S.
Sounds like a cool project. I would love to see it if you get it working.