01 / 14Practical Engineering≈ approximate level B19:12–9:19 , , , .
02 / 14Practical Engineering≈ approximate level C17:17–7:25
, .
03 / 14TED-Ed≈ approximate level B22:25–2:29
, .
04 / 14SmarterEveryDay≈ approximate level B25:47–5:50
.
05 / 14Practical Engineering≈ approximate level C17:24–7:27
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06 / 14Practical Engineering≈ approximate level B18:29–8:33
.
07 / 14Practical Engineering≈ approximate level C110:51–11:00
.
08 / 14BBC Ideas≈ approximate level B23:12–3:18
.
09 / 14Practical Engineering≈ approximate level C18:11–8:17
.
10 / 14TED-Ed≈ approximate level C13:00–3:06
, .
11 / 14TED-Ed≈ approximate level B23:22–3:32
, , , , , , .
12 / 14Bon Appétit≈ approximate level C14:50–4:57
.
13 / 14TED≈ approximate level B212:23–12:30
-- , , .
14 / 14Practical Engineering≈ approximate level C14:45–4:54
, , .