Visual digital intermediaries and global climate communication: Is climate change still a distant problem on YouTube?

PLOS ONE Visual digital intermediaries and global climate communication Table 2. Composition and content of search results for selected languages. Channel concentration is computed using the concentration measure based on entropy (supplementary material: measures), with higher values indicating higher concentration of the results towards a smaller set of categories (and thus lower diversity). Arabic Channel concentration: .41. Content: .08 (PB) .30 (PBI). Lang Category #vid #cha #vie #com #lik %PB %Ice %PBI ar Prof. media org. 27 15 3367 41 4 0.07 0.22 0.26 ar Pop. sci. groups 5 4 443622 7840 804 0.00 0.40 0.40 ar User-led ch. 3 3 4658 114 22 0.00 0.00 0.00 ar (Inter)gov. org. 2 2 5916 58 2 0.50 0.00 0.50 ar Dig. media prod. 1 1 204555 3239 109 0.00 1.00 1.00 ar Online education 1 1 17544 664 39 0.00 0.00 0.00 German Channel concentration: .39. Content: .15 (PB) .22 (PBI). Lang Category #vid #cha #vie #com #lik %PB %Ice %PBI de Prof. media org. 20 15 189056 3667 1206 0.15 0.20 0.20 de No description 2 2 221063 5089 2768 0.00 0.00 0.00 de User-led ch. 2 2 15856 279 132 0.00 0.50 0.50 de Civil society 1 1 5413 210 5 1.00 1.00 1.00 de Dig. media prod. 1 1 285431 4017 916 0.00 0.00 0.00 de Music 1 1 418060 712 26 1.00 0.00 1.00 de Online education 1 1 226329 2553 986 0.00 0.00 0.00 de Pop. sci. groups 1 1 295842 9558 2457 1.00 1.00 1.00 de Religious org. 1 1 285420 2273 30 0.00 0.00 0.00 de Science org. 1 1 5222 174 38 0.00 0.00 0.00 English Channel concentration: .34. Content: .10 (PB) .29 (PBI). Lang Category #vid #cha #vie #com #lik %PB %Ice %PBI

en Prof. media org. 43 32 47974 785 329 0.05 0.30 0.30 en User-led ch. 25 24 89116 4689 540 0.08 0.32 0.32 en Extr. weather ch. 5 2 42125 686 131 0.00 0.00 0.00 en Pop. sci. groups 5 3 4574151 243961 22929 0.00 0.20 0.20 en (Inter)gov. org. 3 2 4000 119 9 0.00 0.00 0.00 en Business 2 2 122354 1238 34 1.00 1.00 1.00 en No description 2 2 923957 14904 2843 0.00 0.00 0.00 en Online education 2 2 299392 3138 98 0.50 0.50 0.50 en Talk platform 2 2 685784 14126 2388 0.00 0.00 0.00 en Civil society 1 1 806 21 0 0.00 0.00 0.00 en Science org. 1 1 21123 211 119 0.00 0.00 0.00 French Channel concentration: .13. Content: .14 (PB) .38 (PBI). Lang Category #vid #cha #vie #com #lik %PB %Ice %PBI fr Prof. media org. 12 10 40314 452 44 0.00 0.33 0.33 fr No description 6 5 6420 124 18 0.50 0.50 0.67 fr User-led ch. 5 5 56007 2683 475 0.00 0.00 0.00 fr Pop. sci. groups 4 3 143014 1041 12 0.00 0.25 0.25 fr (Inter)gov. org. 3 3 26626 3 0 0.00 0.33 0.33 fr Civil society 3 2 38318 393 19 0.33 0.33 0.33 fr Politician, party, … 2 2 14362 2117 300 0.00 0.00 0.00 fr ch. discontinued 1 1 11793 182 130 1.00 1.00 1.00 fr Science org. 1 1 19748 238 160 0.00 1.00 1.00 fr Talk platform 1 1 13214 241 113 0.00 0.00 0.00 Japanese Channel concentration: .05. Content: .15 (PB) .25 (PBI). Lang Category #vid #cha #vie #com #lik %PB %Ice %PBI ja User-led ch. 5 4 22099 783 58 0.00 0.00 0.00 ja Prof. media org. 4 4 15662 194 42 0.25 0.75 0.75 ja Business 3 3 9485 103 4 0.00 0.00 0.00 (Continued) PLOS ONE https://doi.org/10.1371/journal.pone.0318338 April 8, 2025 13/ 23