Leading scientific journals Nature and Science reject over 90% of submitted manuscripts before full review, with an overall final acceptance rate around 1% or less.
"The rejection rate for even reviewing a paper upfront is about 90-plus percent, and then the final acceptance rate is somewhere around 1% or less." (said at 2:20:17)
No published record matching the claim that Nature and Science reject over 90% of submitted manuscripts before review with an overall acceptance rate around 1% or less was located; this does not prove the claim false.
contradicted by web sources
Leading multidisciplinary journals such as Nature and Science reject roughly 60% to 80% of submitted manuscripts without external peer review, and their overall final acceptance rates are typically around 6% to 8%, rather than rejecting over 90% upfront or having acceptance rates of 1% or less.