01 / 30Vanity Fair≈ approximate level B10:37–0:40 ?
02 / 30CrashCourse≈ approximate level B10:24–0:27
.
03 / 30CrashCourse≈ approximate level B22:08–2:15
, .
04 / 30CrashCourse≈ approximate level A21:57–2:04
, … .
05 / 30TED-Ed≈ approximate level B24:04–4:10
, ’s .
06 / 30Sprouts≈ approximate level A21:27–1:34
, , .
07 / 30Big Think≈ approximate level B22:10–2:14
, , .
08 / 30StoryCorps≈ approximate level A21:35–1:39
.
09 / 30CNBC Make It≈ approximate level B27:04–7:09
, .
10 / 30CrashCourse≈ approximate level B10:18–0:24
- .
11 / 30BBC Earth≈ approximate level A22:50–2:54
.
12 / 30TED-Ed≈ approximate level B13:37–3:43
— .
13 / 30Big Think≈ approximate level B22:24–2:30
, , , .
14 / 30SoulPancake≈ approximate level B20:21–0:25
, , .
15 / 30CNBC Make It≈ approximate level A21:00–1:04
.
16 / 30TED≈ approximate level A210:09–10:11
.
17 / 30TED-Ed≈ approximate level B24:17–4:25
, .
18 / 30CrashCourse≈ approximate level B14:45–4:51
% , , .
19 / 30TED≈ approximate level B17:27–7:30
.
20 / 30WIRED≈ approximate level A22:08–2:11
, , .
21 / 30CrashCourse≈ approximate level B28:09–8:21
’s “ ,” .
22 / 30StoryCorps≈ approximate level B21:41–1:46
, , .
23 / 30PBS NewsHour≈ approximate level B13:07–3:18
, , , , .
24 / 30CrashCourse≈ approximate level A210:34–10:38
, : .
25 / 30TED-Ed≈ approximate level C12:02–2:11
.
26 / 30Vogue≈ approximate level C112:08–12:15
, , .
27 / 30TED≈ approximate level C111:16–11:25
- , .
28 / 30CrashCourse≈ approximate level C18:05–8:17
, , , , , , .
29 / 30CrashCourse≈ approximate level C11:42–1:56
, , .
30 / 30CrashCourse≈ approximate level C18:38–8:49
, , , , .