Fix redtube view count and upload date extraction

[gergesh]

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Fixes extraction of view count and upload date for redtube videos, as noted in #22492

[gergesh]

Also to note - I'm parsing this information from a json embedded in the webpage that contains some more info - notably video title, description, thumbnail url and duration.
Maybe it'd be better (faster?) to just parse this json and extract information from it instead of running regexes on the page?