@davidgerard I have an even older Sony camera, and routinely use the HDMI out (plugged into an HDMI-->USB capture dongle, elgato makes good ones, but $20 amazon ones also work). It's a full res feed, up to 4K. Certainly no need for an app! I checked your 4000D manual and apparently all it's doing is feeding the "live display" on the back of the camera. And that display is not high res (spec is 230k "dots", and if that's the same as pixels, it's pitiful).
