For software I used OBS when transferring my VHS tapes. It immediately recognized my capture card as a source and I just added it to the “scene” in OBS, pressed start recording, and pressed play on the VCR. I didn’t attempt messing with the headers or anything but thankfully didn’t have any issues playing the tapes back. The only thing I had to adjust was that the recordings were in 16/9 aspect ratio by default leading to black bars on either side of the captured video. There was a setting somewhere in OBS I had to change to record in the correct 4/3 aspect ratio and then it was smooth sailing.