You want to make your own 360 degree video, maybe with your own drawings or even a 2D animation? With these free templates, you should be able to make something of your own:

BIG FILE OF EVERYTHING: https://sta.sh/01mwb9hxv3us
0:00 - empty cube - template download: http://sta.sh/0nhdl0man2b
0:30 - empty room - template download: http://sta.sh/01ci2vcl5cka
1:00 - empty sphere - template download: http://sta.sh/025nhn2qie3n
EXAMPLE VIDEO (own drawing): https://youtu.be/r7hv9K-u3U8
Drawing GIF preview: https://sta.sh/025ybecfa509

I have published the templates in the Public Domain, which means you can use it for free, for anything, without having to ask me for permission and with no restrictions. Also, this video is in the public domain, feel free to use it anywhere you like.

Have fun! 
If you like, suggest 2D animated 360° videos in the comments so that I can watch more of those!

Don't know what to do?
Use the images as templates for anything you'd like to use in a 360° video. I recommend not to change the aspect ratio. Load your drawing or your animation into a video editor and export the video without any black bars (crop or stretch the image to the video size). A faster alternative is to open the image in VLC Media Player and convert it to MP4.
Before you upload it to YouTube or Facebook, you'll need to inject some metadata into your video file.
More information here:
You can do so by using a program
 - for Windows: https://github.com/google/spatial-media/releases/download/v2.0/360.Video.Metadata.Tool.win.zip
 - for a Mac: https://github.com/google/spatial-media/releases/download/v2.0/360.Video.Metadata.Tool.mac.zip
 - as a Python script: https://github.com/google/spatial-media/blob/master/spatialmedia/README.md
If it doesn't already do it automatically, only the top checkbox should be checked after selecting the video file in the program ("My video is spherical (360)"). Inject the metadata and upload it to a suitable host. Right now, I know of Facebook and YouTube for videos... and Flickr for equirectangular images, I think. I haven't actively looked into other services.

Uploading could take a while. But there are options to view it on your computer to see if everything worked.
You can test the video with VLC Media Player 3.0, which is not the official stable release as of this moment. So you would need to go to https://nightlies.videolan.org/, click on your OS and select the latest vlc-3.0.0-* on the end of the list to get your download options. After injecting the metadata, playing a 360° video works nicely, as far as I tested it.

YouTube might take a while to convert a 360° video into its VR form. Also, uploading anything below 720p is a bad idea because the quality will be really low.

More templates for 360° video (with other licenses) on the internet:
    http://www.finwe.mobi/main/360-degree/orion360-test-images-videos/ (CC-BY-ND) - a superb selection of all kinds of formats for 360° video
    https://www.flickr.com/photos/sbprzd/4008650304 (CC-BY-NC-SA) model test image
    https://commons.wikimedia.org/wiki/File:Tissot_10deg.png (CC0) Tissot's indicatrix for equirectangular projection; more: https://commons.wikimedia.org/wiki/Category:Map_projections_with_Tissot%27s_indicatrix/Templates
    https://www.flickr.com/photos/dmswart/5864327856/sizes/o/ (CC-BY) checkered plane
    https://www.flickr.com/photos/albertotem/27582567795 (CC-BY-SA) hand-drawn equirectangular perspective lines
    https://www.flickr.com/photos/dmswart/26363697850 (not licensed as free) Equirectangular Perspective Lines
    http://studiobehind90.com/2016/12/25/how-to-create-360-panorama-painting-in-photoshop/ Cubemap to 360 Photoshop tutorial
    http://magazine.artstation.com/wp-content/uploads/2017/04/Grid.jpg (not licensed as free) Awesome grid with depth, similar to my template
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