Here’s another set of video explanations (one math, one verbal) of practice problems found in ETS’s Paper-based Practice Test for the Revised GRE, a PDF released by the test-makers themselves.
You can find the whole set of explanations for every practice problem here. Enjoy!
Math: Section 5, Question #21 on page 79 that begins: “The total number of recording titles distributed by music distributors L and M is 9,300. The number of recording titles distributed by L is 7,100, and the number of recording titles distributed by M is 5,200….”
Verbal: Section 3, Question #21 on page 57: an RC question on the passage about brain processes that begins, “In the context in which it appears, “temporal” (line 13) most nearly mean…”