yeah, that's ok. it shows you actually watched the video and you aren't making people leave that channel to go to yours.I've always disliked outright obvious self promotion or 'Wanna be youtube friends? Sub for sub!!!'
Although, I do occasionally mention if i've done a video of the same topic on a video.. For example, If someone spoke about glasses in a video i would say something like 'Haha, Oh god, I posted a video a while back about glasses but this has given me so much inspiration to do another, This is great! good job!' or.. Something along those lines..
Is that bad, or?
These kinds of comments bother me on so many levels.How about the ones where they obviously haven't even watched your video, it will say "Great video man! How about checking out my channel..." Sigh.