[ccma] improve metadata extraction(closes #27994)
[ccma] improve metadata extraction(closes #27994)

- extract age_limit, alt_title, categories, series and episode_number
- fix timestamp multiple subtitles extraction

Tatsh/youtube-dl,ozburo/youtube-dl,rg3/youtube-dl,ozburo/youtube-dl,rg3/youtube-dl,Tatsh/youtube-dl