01 / 16CrashCourse≈ approximate level B13:20–3:23 .
02 / 16TED-Ed≈ approximate level B20:06–0:12
’s .
03 / 16Lex Clips≈ approximate level B21:53–1:59
, , .
04 / 16TED≈ approximate level C14:24–4:29
: , .
05 / 16CrashCourse≈ approximate level A25:13–5:19
, ’s .
06 / 16TED-Ed≈ approximate level B24:06–4:18
, .
07 / 16Big Think≈ approximate level B15:13–5:17
.
08 / 16BBC Earth≈ approximate level B22:08–2:13
, , .
09 / 16Lex Clips≈ approximate level A21:46–1:54
, .
10 / 16PBS NewsHour≈ approximate level C10:48–0:53
, 's .
11 / 16BBC Ideas≈ approximate level B12:48–2:50
?
12 / 16CNBC Make It≈ approximate level B25:30–5:37
, .
13 / 16SoulPancake≈ approximate level B21:59–2:05
, , .
14 / 16NBC News≈ approximate level B20:58–1:08
, -- , .
15 / 16Vogue≈ approximate level C10:30–0:39
, , , , .
16 / 16The Late Show≈ approximate level C12:51–3:06
, , , .