Hi there! In my experience, the conversion rate is not a direct result from the quality of the video, but from the target you are pursuing. Some targets and products need, on the contrary, a lower quality video, which impacts in emotion from an "easy going" perspective. I think you will have the best demonstration not in external examples, but on your own experience. You can try both, but with very little investment, to measure the impact the quality has in your specific target, before going in a further planning. What it really matters for sure, always, is the emotions you appeal and the direct call to action to generate the conversion. Of course, it all depends on the product /service you are dealing with, and the target to whom you direct to. I hope I was clear in my point of view. I remain available for any questions you should have. Cheers!