How to Convert Any Video to the new released iphone 6s?

As I prepare to upgrade my iphone to the latest iphone 6s released today. As I used to watch various kinds of videos on my iphone. I'm worrying the latest iphone can't support the previous and the later videos.So I wanan know how can I Convert Any Video to the new released iphone 6s?

If you read the manual (RTFM) that comes with the iPhone (or you might have to download it, it will tell you what format it uses, and what size the video needs to be reduced to. Once you know that, you can use whatever software to edit to suit the phone. But you already knew that because that is what you would have to do with your old phone.

For the record the 6s will be released on the 25th. It was not released on the 9th, just announced.

The formats of video it supports would not change.

To convert video files to iPhone 6s supported video formats, I guess you need a video converting tool that can help you convert any video format to your iPhone. I'm using iCoolsoft Total Media Converter, it can help me convert MTS, TS, FLV, WMV, MKV, etc. Video formats to my iPhone 6 supported MP4 video format. The newest iPhone 6s would not change the supported video formats.