secondly, I too found it 'not working' (with the 50% setting) but if I pressed 'F5'/refresh or opened the video in another tab (same as refreshing the page) the like button would be lit up: ie. it works but the graphics of the thumb only displays if you press refresh (I'm using v2.7.1 on Opera)
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try testing with 'Instantly'
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updates default to "Only videos from subbed channels" - it's working for me on all videos after I changed the setting to "ALL videos"
The patched version v2.5.2 seem to not working in a playlist/watch list because i watched more of 50% of the video and it didn't liked it!
Originally posted by @austencm in https://github.com/austencm/youtube-auto-like/issues/73#issuecomment-822071012
Log
Wed Apr 21 2021 Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.141 Safari/537.36 OPR/73.0.3856.434 YouTube variant: material navigated: https://www.youtube.com/watch?v=EFwNlHvzz5I&list=TLPQMjEwNDIwMjG_rurt-7YS3Q&index=2 loading options... ...options loaded (disabled: false,like_what: subscribed,like_when: percent) liker initialized not a watch page stopped liker initialized waiting for video... ...video ready waiting for buttons... ...buttons ready like button clicked stopped