Types of InStream video blocks
The type of InStream video block defines how a video should be played against the main video content requested by the resource user:
Pre-roll: before the main content;
Mid-roll: in the middle of the main content;
Post-roll: after the main content;
Pause-roll: when the "Pause" button is pressed.
The Yandex Advertising Network has the following restrictions on the number of different types of blocks created for a single video resource section:
Pre-roll: no more than one.
Mid-roll: no more than seven.
Post-roll: no more than one.
Pause-roll: no more than one.