hotfix parses the throttling array javascript error nontype

[thinhpm]

Fix error 'NoneType' object has no attribute 'span'

[Derpiesaurus]

Not sure if people usually are able to publicly show a like for a pull request as I don't use my Github account often, but I don't see a button so I'll comment that this worked perfectly, so thank you!

[glubsy]

Perhaps changing the regex would be beneficial as well, as mentioned here.

Also adding some tests to the test suite would be a good idea.

[RONNCC]

hey @thinhpm

Thanks for the PR!

If this is still relevant, could you add the following:

• a unit test to show the behavior before and after
• some context on the need for the change

Ideally this would 'break' in the future when youtube also changes behavior again and we can show it as a regression