I don't, I'm sorry. I've kind of just stumbled through it over the past 12 years or so. I'm probably putting you off unnecessarily, I am a notoriously negative person. Getting in to it to start with will be fine, if you want to film for a bit on your DLSR, transfer the file to your PC (same as you do with images, although see below*), and then upload to YouTube, you won't have to do anything, it'll all probably work fine. * If I recall, you don't have a PC and do your stuff with a tablet? That might be more challenging with videos. The 70D does these video options, I recommend using 1920 x 1080 at 30p (roughly 30 frames per second), with IPB if you're going to upload straight to YouTube. If you want to do high-end editing you would choose ALL-I which gives you better per-frame quality. The 200D supports the same size (1920 x 1080 at 30p) but will also do that resolution at 60 frames per second (which will let you play back at roughly half speed, slo-mo, if you wanted to). To do that on the 70D you'd need 1280 x 720. So I suggest picking the highest resolution, and 30p (for normal playback), but using IPB if offered the choice (smaller file size, not as good for editing but unlikely to notice any difference in actual viewing).