It is amazing that you are seeking to upscale content. The Sony ZV-1 is a classic because of a reason, and it has some personality traits which you are to know before you place your finger on the trigger.
How it can be made most out of (Step-by-Step):
Stop the Overheating: It could automatically turn off during prolonged 4K video out of the box. To correct the same, enter the Menu > Setup (Toolbox icon) Auto Power Off Temp and change it to High. And, leave the flip screen open during recording it will aid in the heat escaping!
Smooth Your Shots: The in-built stabilization is decent, however, when you are walking, also ensure that you enable Active SteadyShot. It does cut the picture slightly, but the film is far less shaky.
Pro Audio in Seconds: Do not forget to use the deadcat (that fluffy wind muff) that is in the box. It only needs to be slipped into the hot shoe up top and it will silence the noisy wind that causes such a nightmare when filming a travel video.
Save Your Battery: These smaller batteries do not last and last. In case you have to work over an extended period, I would grab a inexpensive external power bank and plug it in the USB in the process of shooting.
Imagine it to be a compromise: it is even more robust than a phone due to its large sensor (smoother backgrounds and night shots), but also much smaller than a large mirrorless camera.
The Bottom Line
In case you desire that soft background and fine focus and yet do not want to carry the huge kit, the sony-zv1 is the most favorite option; it is almost like a high-end vlog production, only that it fits in your pocket and thus is much more travelable than a limited smartphone, and much easier to carry than a bulky mirrorless set.
