Invidious, by design, has no images attached to chapters, in contrast to Piped.
Since the majority of videos with chapters don't have chapter-specific images and only use the videos' thumbnail, there is no difference here when compared to Piped's native thumbnail support.
New options for captions in `Settings-Player`:
- Always show captions
- Default language
User can now select whether they want to show captions automatically when the video starts, and select the language.
Captions selector now shows proper name -> `English (en)` instead of only `en`
I added a new feature. When instances are not proxied, Yattee first checks the URL to make sure it is not a restricted video. Usually, music videos and sports content can only be played back by the same IP address that requested the URL in the first place. That is why some videos do not play when the proxy is disabled.
This approach has multiple advantages. First and foremost, It reduced the load on Invidious/Piped instances, since users can now directly access the videos without going through the instance, which might be severely bandwidth limited. Secondly, users don't need to manually turn on the proxy when they want to watch IP address bound content, since Yattee automatically proxies such content.
Furthermore, adding the proxy option allows mitigating some severe playback issues with invidious instances. Invidious by default returns proxied URLs for videos, and due to some bug in the Invidious proxy, scrubbing or continuing playback at a random timestamp can lead to severe wait times for the users.
This should fix numerous playback issues: #666, #626, #590, #585, #498, #457, #400
Chapters have their own section is the settings. The users can decide if chapter thumbnails should be shown or not. Also they can decide to only show thumbnails if they are not the same.
The VideoDetailsView had to be modified, to avoid compiler type-checking errors.
When a user taps on a chapter, the pop now also shows the name of the chapter. The chapters are now marked in AppRedColor instead of orange.
This is based on PR #639
That one needs to be merged first before this one can go in.
