How long has your watch time been lacking? If it's been a temporary pause, it could always be lag on YouTube's end. Sometimes they will show in your YouTube studio when some stats are delayed, so if everything has been on pause, it could be one of the glitches, in which case, don't worry about it and make more content.
I mean, to be honest, watch time comes from how much of your video someone watches, not the views it'self. So if your video gets very low watch time, that means you need to re-evaluate what you're doing in your videos. Are you making videos purely for views? Or are you making videos to answer a question people have? It all revolves around the audience and what they want and how satisfied they are. You can't FORCE someone to watch something (and that can quickly head towards spammy territory) it's far better to be compelling and interesting.
You can always look at your titles and thumbnails to see if they could be more interesting, and that can help push the needle a little more, but if someone clicks, and they don't want to watch the whole thing, there's nothing you can do except for use it as a learning experience on what to not do on your next video, and try a different approach.
I'm studying the phycology of the watching experience, and I don't think we often think about that as much as we should. Humans are interesting and complex creatures, and far more complex than any algorithm. They're hard to figure out and it's something I'm trying to study to boost my own watch time.
A lot can be done in studying editing and story telling as well.