So after downloading a video I went searching for the location and found it to be in Android->Data->com.samsung.vrvideo
In there is a number of jpg previews, the full videos you have downloaded, and .json files for them. Make sure you have downloaded at least one video so you have a .json file to edit for your video. Copy the .json file and open in a text editor. In there the fields to change are rather obvious. If anyone needs specific guidance, feel free to ask, but you should be able to figure out what is what. You'll see you an set the path of the video file. While I have not tested putting the video file on my SD card and pointing the .json there, it will likely work.
What I have done so far is put both the .json file and the .mp4 video file with the same name in that folder and it payed beautifully! I didn't update the preview image link so it shows a different preview, but it looks to be able to use a local or web link for that, so you can set that to anything you want in the .json file ^_^
This will work with not only work with local files, but any mp4 with a direct web link! It's all in the .json file.
When I have a chance I'm going to look into it further. I'm hoping there is a setting that can be set in the .json file that allows for 180 videos as well as defining if it's a top bottom or left right stereo video. If someone gets to this first and finds something, please post!
In case you are wondering why you would go to this trouble instead of just using the 360 video player, try Milk. It's far better with full controls for the video playback.
UPDATE:
Confirmed commands so far:
"metadata": {"stereoscopic_type": "left-right"} - For Left Right Stereo 360 videos
"metadata": {"stereoscopic_type": "top-bottom"} - For Top Bottm Stereo 360 videos
Example .json data - Items in RED are what you enter the info for
{
"id":"Example",
"title":"Example",
"author":"Example Author",
"added_on":"2014-12-30T19:22:45.019916",
"view_count":"0",
"likes":"0",
"video_url":"https://DOWNLOAD URL",
"video_url_stream":"https://STREAM URL - MAY BE THE SAME AS DOWNLOAD",
"local_url":"file:////storage/emulated/0/Android/data/com.samsung.vrvideo/files/YOUR LOCAL VIDEO FILE.mp4",
"thumbnail_url":"USE http:// for web JPG or file://// for a local JPG file",
"thumbnail2_url":"Same as above for secondary thumbnail",
"author_profile_img":"Same as above for Author thumbnail",
"video_bytes":Size in bytes with no quotes,
"duration":Duration in seconds with no quotes,
"downloadPercent":100,
"metadata": {"stereoscopic_type": "left-right OR top-bottom"},
"download_request_timestamp":
}
.