In the PRO version you can configure timeouts in the VAST plugin settings. These are time intervals for waiting for certain events, after which advertising stops if these events do not occur.
By default, the ad load timeout is 10 seconds. The same amount of player expects VPAID to launch - this value can be increased if the advertisement expects a separate launch (for example, for YouTube).
Timeout for advertising block
This timeout can be configured for the entire ad block. It is specified in minutes but you can specify a fractional value. The timeout will be triggered if no ads were shown at the specified time.
Also in the this timeout settings you can specify the message that will be displayed before the first impression. A timer is automatically added to the message.