Appropriate error message should be shown when not cached media file is played when no internet/wifi connection available

[MadhaviSeelam]

Description

Description Found while testing https://github.com/brave/brave-browser/issues/32585. If a media file is not cached (i.e. Automatically add files for offline viewingsetting is disabled) and internet/wifi is disconnected and media played in the playlist panel, it will play for about 3 minutes after disconnecting wifi. The frame is frozen and later if switched to different media file,Failed to play itemerror along withmay be expirederror is shown. YouTube page is shown withConnect to the internetandNo internet connection` message at the bottom. Not sure if this is expected.

Steps to reproduce

1. Install 1.70.44
2. launch/relaunch Brave
3. open brave://settings/braveContent
4. disable Automatically add files for offline viewing setting
5. Add few videos to the Playlist
6. disconnect internet/wifi connection

Actual result

media played for about 3 minutes frame is frozen but nothing happens switching to another file causes an error message to load

https://github.com/user-attachments/assets/379661b8-2d3c-49db-b281-71edb5d3a62e

Expected result

Appropriate error message?

Reproduces how often

Easily reproduced

Brave version (brave://version info)

Brave	1.70.44 Chromium: 127.0.6533.88 (Official Build) nightly (64-bit)
Revision	c6e95da37b2d012afdca7bcc03a727e24cb2bb1c
OS	Windows 11 Version 23H2 (Build 22631.3958)

Channel information

• [ ] release (stable)
• [ ] beta
• [X] nightly

Reproducibility

• [ ] with Brave Shields disabled
• [ ] with Brave Rewards disabled
• [ ] in the latest version of Chrome

Miscellaneous information

@rebron @bsclifton @sangwoo108 cc: @brave/qa-team

[aguscruiz]

What about something like this https://www.figma.com/design/RxyQnpxi9qtf5HmnAj1yH0/Desktop-Playlist?node-id=3593-23469&t=tGRUeYKbcwW1zKfL-1

What do you think about the copy @rebron

[rebron]

The copy looks good. I don't think we need to encourage caching the files.