Auto seeding video duration to database without manual intervention

[mvp5464]

PR Fixes:

• 1 If video duration is empty, and anyone clicks on that video, It adds video duration to the database
• 2 Video thumbnail will have proper duration

Resolves #485

Old PR #486 #558 : Closed because of many merge conflict other problems

Checklist before requesting a review

• [x] I have performed a self-review of my code
• [x] I assure there is no similar/duplicate pull request regarding same issue

1> Need to seed every-time when uploading a video

2> Week-9 is seeded but Week-10 is not seeded

Approach

Screencast.webm