Made changes to the styles on the video playback page to enhance visibility and address issues with the video player.
Added a new custom style file for Plyr, and removed redundant and unused styles in watch.css.
Specific changes:
- Added custom_plyr.css for Plyr styles.
- Removed redundant styles related to playback issues in watch.css
Add autoplay support for related videos. Move the playlist autoplay code
into this shared script. Add the SameSite=Strict attribute to the
autoplay cookie due to Firefox soon rejecting cookies which use
SameSite=None without the secure attribute.
Closes: #50
Signed-off-by: Jesús <heckyel@hyperbola.info>
