Sounds really good. It seems you're improving. At some points I'd work on fluency (e.g. 0:20, "In order to get, um, in order to, in order for a species/crop to have a certain... trait,"  2:27, 7:11 etc. there's a short pause/many awkward pauses mid sentence.) There's also a couple uses of the word the, which I don't know are necessarily wrong, but just sound unnatural to me. (e.g. 0:29 "Scientists used the very exensive approach called selective breeding," Instead of, "Scientists used a very exensive approach called selective breeding," 0:56 "Using certain viruses as the medium," instead of, "Using certain viruses as a medium.") At 2:12 pronounciation of videos is off, unless I'm off and you meant something else. Overall, I'd say your content is great, and your pronounciation is great/perfectly understandable, but your execution needs work. It makes you hard to follow. You don't have the correct "rythme" when speaking, if this makes sense. Keep up the great work!