If it doesn't interfere with my main customers or cause anyone problems or harm, and it doesn't break any laws, they are welcome to go for it. If it's a physical product, it's their property once they buy it. They can disassemble it, modify it, fix it, resell it, give it away, destroy it, and otherwise use it in unintended ways all they want.
If it's a digital product, there are IP laws that disallow piracy and unauthorized commercial use and stuff like that, but I don't really care about how people use my digital products if it's just for personal use (again, assuming they are not harming anyone). If they want to print posters of it, use it as art references, hold viewing parties, or whatever else, it's fine by me.
I plan the video I want, shoot the video I can, and edit the video I have. I've been through this process enough times to know how it goes. Usually everything is fine along these steps. Sometimes I have to make adjustments, but I still get something useful. Other times, I end up trying to polish a turd in the editing bay (especially when there are audio problems, gat'dang those are frustrating). Occasionally something gets so messed up along the way that I scrap the entire project or even kill the shoot right there on set. I've only had to do that a handful of times though.
Of course, creating good content that I am happy with does not guarantee the audience will like it. That has a lot of random elements and can't really be controlled directly. The levers that drive audience engagement are unwieldy in the best of circumstances.