We propose some interesting ideas, e.g., small amount of metadata is transmitted to a server in real-time while video content will remain on the device; the server will ping the device when it wants the user to upload the video.

1. Upload metadata first
1
Capture a video
Metadata
first?
NO
YES
1. Upload metadata by
login users
• Add a checkbox to
Settings: “Upload video
metadata automatically”
Login?
YES
2. Upload metadata
anonymously
NO
Workflow of Mobile Apps when After Capturing a Video

2. Upload metadata anonymously
2
• Upload metadata anonymously (for instant recording)
• Use (device_id with video_id) to uniquely identify the
uploading metadata.
• These ids can be used to match the metadata with its content
that will be uploaded later on server.

3. Upload video content passively
3
Server asks client (with device_id) to upload a
video content (with video_id)
YES
Upload video content
Login?
NO
Server matches video
metadata and its content
Workflow on Server and Mobile Apps when
Server ask a Client to Upload Video Content
This can be done
with some code on
the server to send
push notification
to Android/iOS
Consent
?
User receives a notification to upload a particular video, e.g., “Please
upload video with id (or keyword)?”. User response with YES/NO.
YES
Show a message “Upload video content
requires log in”. When user login he can see
the highlighted videos need to be uploaded

4. Upload video content actively
4
Metadata
first?
NO
Upload both video
metadata and its content
Upload video content
Server matches video
metadata and its content
Workflow on Server and Mobile Apps when
User Choose to Upload a Particular Video
YES
User choose to upload a
video