01 / 8MKBHD≈ approximate level B17:53–7:59 .
02 / 8MKBHD≈ approximate level C17:32–7:37
.
03 / 8Practical Engineering≈ approximate level C14:26–4:34
’s .
04 / 8Tom Scott≈ approximate level B24:01–4:07
, , .
05 / 8SciShow≈ approximate level B10:25–0:34
, .
06 / 8CrashCourse≈ approximate level C110:16–10:27
, , , .
07 / 8SciShow≈ approximate level B15:22–5:31
, .
08 / 8Practical Engineering≈ approximate level B24:33–4:47
, , , .