Especially for Youtube, where there are as of 2022-09 close to 6000 videos with written Cantonese subtitles Cantonese YouTube - Google Sheets
Language codes typically used:
zh-HK
zh-Hant
yue-HK
zh-Hans
yue
Cantonese has high global utility – 19th most spoken language, more than Korean, Vietnamese, or Italian. Thank you for your consideration!
I would also like to have Cantonese. At lease the transliteration for characters to choose between Mandarin pinyin and Cantonese jyutping/yale
We Cantonese learners suffer hard. Throw us some peace 
Cantonese support would be great! Especially now that LR has FSI/DLI courses, I can only choose Chinese (S/T), but not Cantonese, even though there’s a really comprehensive FSI Cantonese course!
Search hokky /miteiru on github this project supports Cantonese