How to put videos on my iPhone 6 without iTunes sync?

You can use other software like itools,ifunbox,moborobo tool, this is simple as drag and drop, but using itunes is easy and safe as other tools. here is a simple guide of using itunes

if you have an itunes software installed on your pc/laptop

*plug you iphone and wait itunes sofware to open (or you can simply open your itunes if not automatically pop-up)
* if your phone is detected, you can cancel the sync process by clicking the x button beside it.(a progress icon shown on top)
* click the your phone icon that has been detected
* click "On my iphone" menu.
*click video then you can easily drag it from you computer and drop it on the box.

remember that iphone only accept mp4 video format,otherwise it needs to be converted using any video converter that can be download as free.

and lastly if transfer is done,eject you phone by clicking the triangle button beside the phone icon to avoid data loss.

You HAVE TO USE itunes,put your video on itunes and then transfer it from itunes to your phone