I think it really depends on your learning goals and styles. Some people benefits from having a teacher who can help them personalize their learning; some people love the flexibility of learning from video lessons at their own pace (and the ability to replay the instructions!). Personally I take private lessons and I augment that with other forms of learning such as video lessons and workshops if and when necessary. In my opinion there are some complex subjects that are not ideal for a one-directional transfer of information (lectures, video lessons, etc); that’s why some learnings are better suited for small group instructions and/or private tutoring. I am also the kind of learner that benefits from working through problems with an expert instead of reading an instruction manual. But not everyone learns the same way and not everyone wants the same learning outcomes. If the goal is to learn to play some tunes that you enjoy, video lessons with the occasional workshop or private lesson would probably be quite sufficient.
I work a full time job and is married with young kids. Making time to learn and practice the harp, regardless of how I am learning it, is a personal commitment I have to make an effort to uphold for sure. I have to figure out how much time is realistic for me to invest in learning and playing the harp, and how to prioritize things when there are so much more going on in life than harp. Maybe the fact that you are looking for a change in your harp learning routine is an indication that you are not entirely satisfied with the way that you are spending time with the harp? If I were in your position, I would ask myself what is causing me to rethink how I spend time with the harp and what is a different outcome (or outcomes) that you are hoping for. From there I would work backward to figure out what kind of learning would meet my needs.