Use green flag to start, May take time based on the potato % of your pc. Sound can be a bit off not matching to what the character is speaking, mainly due to as mentioned above your pc or ram or mainly because scratch handles big things a bit crappy use turbowarp yourself I won't provide the link
Used a python script, made by Gemini: Here is the page of the script! : "https://github.com/ingotmonster4-star/VideoSpitter" If you want to use this script it's free but make sure to give credit to me please!..