Honestly getting comments is pretty hard, you either need to make a bold statement, say something relatable, ask a question or have an active audience in the first place to get comments, I don't get many comments apart from on my more popular videos and those videos are usually more of a 'sit down and talk' type video, a haul or something similar so that sparks more questions
different types of videos just attract more comments naturally, you can't really force it, which sucks but tats just how it works!
Any time someone comments make sure to comment back or start a conversation when you can, this encourages other people to comment too!