If what you've read so far does not sway you, most of the cams available on ALI or eBay are not going to be UL or ULC approved. Judging by the the teardowns that I've seen on similar devices and the poor build quality of some of the discounted offshore stuff, I would not risk burning down my house to save a few dollars.
That said, it is the early days of these type cams and the general idea is a quick problem solver for many people and locations. If you are set on buying one, I would check your local big-box stores and see if they offer one that has a UL approval.