Hi,
I can develop an app for you to record videos on smartphones and then save those videos to your server in mp4, The basic requirement but I still want to have some detailed discussion, covering some question like do you want a cross-platform app for IOS and Android or want to develop Native apps, Plus How you want to incorporate web browser in it?
Kindly drop me a message to initiate chat, let's discuss it in more details.
Best,
MK