Table 3. Overview of the data.

Video links are reported in the appendices.

s: seconds, n: numbers

Video number	Academic	Duration(s)	Views(n)	Quality -1	Quality-2
1	Yes	1102	58347	46	61
2	No	135	5409	8	37
3	Yes	697	10429	13	32
4	No	347	324	1	17
5	No	191	27452	35	53
6	Yes	191	631	7	33
7	No	149	8920	0	4
8	Yes	56	10736	6	17
9	No	85	711	13	22
10	No	140	420	0	2
11	No	235	155	1	6
12	No	193	271	8	35
13	No	219	287	35	48
14	No	153	1695	4	23
15	No	93	325	4	8
16	No	30	59	2	13
17	Yes	462	52	37	37
18	No	80	20	3	5
19	No	15	444	0	0
20	No	72	84	0	0
21	No	84	146	17	21