[YouTube] fix: handle new like count viewModel

[Theta-Dev]

YouTube introduced a new view model for the like count on video pages (next endpoint). It currently appears in less than 1% of requests but that will probably change.

The data structure looks like this (lots of fields omitted):

{
  "segmentedLikeDislikeButtonViewModel": {
    "likeButtonViewModel": {
      "likeButtonViewModel": {
        "toggleButtonViewModel": {
          "toggleButtonViewModel": {
            "defaultButtonViewModel": {
              "buttonViewModel": {
                "iconName": "LIKE",
                "title": "4.2M",
                "accessibilityText": "like this video along with 4,209,059 other people"
              }
            }
          }
        }
      }
    }
  }
}

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[AudricV]

Closing in favor of #1127, which I wanted to open before you opened your PR.

I think my PR should fix the issue in a better way than yours, what do think?

Anyway, thank you for your pull request and your time.