I have used organic tomatoes, organically grown tomatoes and tomatoes out of my garden (which are organic in the sense that I do not use any chemicals but my neighbors do on their lawns, etc. so I can’t really control the whole soil quality thing with runoff, etc.) Out of season, conventional, grocery store tomatoes would be awful…because they are awful fresh. I think if they taste good fresh, they will be good canned. Some people only can roma tomatoes, or beefsteak, etc. For my purposes, a mixture (like I used in the video) is just fine! Last summer was my first summer canning, so I only have that experience to go by. The tomatoes were great! I use them mostly in soups, chilis, spaghetti sauces, etc. You can also can crushed or diced tomatoes but I think canning the whole/half/quartered tomatoes is easier. Then if I need crushed tomatoes, I open the jar, put in a bowl or pot and blend quickly with my stick blender (or puree in the vitamix).
Good luck!

Thanks, Mia 😉