Lots of limitations here but they do offer an 'ask' button under some circumstances: https://support.google.com/youtube/answer/14110396?hl=en

I've found it to be helpful in getting quicker information out of some 'review' style videos, where I can ask a few pointed questions and get answers faster than the narrator can get to that info. I hadn't found it to be wrong in my few attempts with it, but ymmv