BUG: 400 during `events/` call

[deepansh96]

A POST call to events/ is made every few seconds when someone is on the player. In the POST call, player time is sent as this.player.currentTime.

Sometimes when the player is loading up, the POST call is made before the plyr has been initialised.
This leads to player_time being sent as null as this.player.currentTime is null.

And this leads to a 400 BAD REQUEST error as a null player_time is not allowed by the backend.

This is also the most encountered issue logged by sentry
https://sentry.io/organizations/avanti-fellows-af/issues/2631317729/?project=5828567&query=is%3Aunresolved&sort=freq&statsPeriod=14d