01 / 21BBC Earth≈ approximate level A22:33–2:38 , .
02 / 21CrashCourse≈ approximate level C18:50–8:57
, .
03 / 21CNBC Make It≈ approximate level B15:46–5:51
, .
04 / 21TED-Ed≈ approximate level B20:19–0:25
, .
05 / 21The Economist≈ approximate level B13:17–3:22
, .
06 / 21CrashCourse≈ approximate level B29:54–10:00
, .
07 / 21TED-Ed≈ approximate level C12:36–2:46
’s , .
08 / 21The Late Show≈ approximate level A26:34–6:39
, --?
09 / 21The Late Show≈ approximate level C16:40–6:47
, , .
10 / 21CrashCourse≈ approximate level C13:00–3:07
, , , .
11 / 21Sprouts≈ approximate level B11:43–1:51
, .
12 / 21PBS NewsHour≈ approximate level A22:47–2:56
, , .
13 / 21The Economist≈ approximate level B26:00–6:05
.
14 / 21CNBC Make It≈ approximate level B26:45–6:53
, .
15 / 21TED≈ approximate level B10:37–0:44
-- -- .
16 / 21Lex Clips≈ approximate level A24:22–4:27
's , .
17 / 21WIRED≈ approximate level B110:31–10:40
, , , .
18 / 21CrashCourse≈ approximate level C12:16–2:24
, , , .
19 / 21The New Yorker≈ approximate level C11:12–1:29
, ,
20 / 21CNBC Make It≈ approximate level C12:21–2:35
, , $ .
21 / 21TED≈ approximate level C12:19–2:28
, - .