Damn annoying

I'm seeing that too for most YouTube URLs I try. I've been able to get a few to work from recent Imgflip creations that have a YouTube link, for instance the link on this page: imgflip.com/gif/3lu6r9

It looks like YouTube changed their API on 2020-01-10, the issue might be related to that.

For the time being, you may have to upload video files of YouTube content to the imgflip.com/gif-maker instead of using URLs.

There is a feedback link at the bottom of the page, use that to send in greater detail of the issue you see on your end, that should help find the bug.

Ya, sent feedback twice.....I will try working on uploads then or convert the YouTube videos to something else....

Thanks for sending those. Looks like the link I tried a couple days ago is working in the gif maker now.

https://youtu.be/R1NagZN2kjY

Yep, they fixed it.......