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why do some YouTube videos on lemmy have a thumbnail, while some don't? (lemmy.world)

submitted 3 days ago* (last edited 3 days ago) by [email protected] to c/[email protected]

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If you go to [email protected] and scroll you'll see some of the posts have a youtube thumbnail image, but not all.

I wanna post YouTube videos, but no one seems to engage much without a thumbnail, which makes sense, but I'm not sure what would result in the post actually having a thumbnail

If anyone has advice or guidance I'd appreciate it :) Thanks!

EDIT: so far it seems like it's potentially a combination of what version of lemmy the posters account is running, and how that instance is configured...

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[–] [email protected] 11 points 3 days ago (8 children)

It's because Lemmy can't fetch YouTube thumbnails. I swear it used to fetch thumbnail and title automatically before, hmm

[–] [email protected] 12 points 3 days ago* (last edited 3 days ago) (3 children)

It's because YouTube puts a bunch of JavaScript at the start of the file (1MiB) before the opengraph tags and Lemmy only fetches the first 512 KiB (a fix was merged a couple days ago).

[–] [email protected] 6 points 3 days ago* (last edited 3 days ago) (1 children)

If you don't put a whopping 1MB of JavaScript in your website, you're doing web development wrong.

[–] [email protected] 2 points 3 days ago

Don’t forget to add also the 2856 partners intrusive code lines and cookies to have a "better experience"

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