VideoInsert

VideoInsert[video, t -> new] inserts the video new at time t.

• VideoInsert[video, {t1, t2, ...} -> new] inserts the same video at multiple positions.
• VideoInsert[video, {t1 -> new1, ...}] inserts multiple videos at different positions.

Examples

Insert at time t:

VideoInsert[video1, Quantity[5, "Seconds"] -> video2]

Multiple insertions:

VideoInsert[mainVideo, {
  Quantity[2, "Seconds"] -> clip1,
  Quantity[8, "Seconds"] -> clip2
}]

Please visit the official Wolfram Language Reference for more details.