Nothing appeared, doesn't work.

Does not work. It shows the rss button but when clicked it says "RSS Link copied to clipboard". Pressing paste shows that it clearly does not work as the last thing pasted is the last thing BEFORE you clicked the rss button that this generates.

Didn't work for me, the button appeared it just wouldn't copy to my clipboard

doesnt work

Works ok but the button doesn't appear for all channels, I suspect because it's unable to find a feed if it can't identify the channels ID.

for some channels (having some name as ID) it gives URL with this name (instead of UCXXX..) - so youtube cannot recognize it as RSS feed link.

Excellent extension! Does what it says. Intuitive design. Simple. Fast. Effective.