Greasy Fork is available in English.
Buffers the video without autoplaying and puts it in HD if the option is on. For Firefox, Opera, & Chrome
< Feedback on YouTube Auto Buffer & Auto HD
Don't worry, I'll have to make it work with HTML5 since they're making it the default.
That's awesome news, thank you.
Try the beta. It should work with HTML5 on Firefox.
how to get the beta?
I started putting them in the beta thread.
Doesn't work with HTML5
If I set Youtube to use HTML5 rather than Flash, any video will be stuck at 720p and won't auto-buffer.