When user device is physically offline, the downloaded videos stop playing when fast forwarded.

[kkalarickal]

Bug Description

Scenario: User downloads a video for offline viewing, then physically shuts off WiFi & Data connection or goes into Airplane mode. Now, without internet, when the user tries to play the downloaded video, the player starts from the beginning. However, if the user fast forwards by clicking on the timeline, the video starts from the new point, but within a few seconds it stops playing and stalls.

Expected Behaviour

The video player should be able to function with the same controls in offline mode as it does when online. So the user should be able to fast forward and continue viewing the video.

Steps to reproduce

1. Go to KINO Staging Site on Google Chrome
2. Download one of the videos for offline viewing.
3. Now break the internet connection to the device by switching off WiFi or going into Airplane mode without data connection
4. Play the downloaded video
5. You will notice that the progress bar increments normally, with some amount of prefetching like behavior seen
6. Next fast forward by clicking the progress bar ahead of the current time and beyond the bufferend amount
7. The video jumps to the new time point, plays for some time and then stops when the progress bar reaches end of prefetched data.

Screenshots

1. Downloaded file for offline viewing followed by breaking internet connectivity to the machine
   

2. Start playing the downloaded video while internet is cut -- NOTICE that the video button shows || indicating play
   

3. Click forward, and wait for a bit. The video stops playing - NOTICE that the play button is > indicating pause/stall
   

Additional context

• Project version: da8ec7d
• Node version: n.a.
• OS: Win10
• Browser: chrome
• Device: Galaxy S III

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Acceptance criteria

Implementation brief

QA testing instructions

Demo

Changelog entry

[kkalarickal]

Verified on https://web-dev-media.web.app/ using the instructions in the bug description.

Confirmed that the fast forward, start/pause/restart/stop etc user functions yield a smooth experience.
Confirmed that there is no more network requests from SW for video content in cloud after going to offline mode

Closing this ticket.