You usually can’t convert a video directly into a Roblox ID, because Roblox IDs refer to uploaded Roblox assets such as a video, audio, image, or animation, not to an arbitrary file from your device. If you want the video to play in Roblox, you need to upload it through Roblox’s video feature and then copy the resulting asset ID.

What to do

  1. Open Roblox Studio and add a VideoFrame.
  2. Upload the video through Roblox’s supported video workflow.
  3. Copy the asset ID Roblox gives you after upload.
  4. Paste that ID into the VideoFrame’s VideoId property, usually in the form rbxassetid://1234567890.

Important limits

  • Roblox video support is not the same as a normal MP4 file you can reuse anywhere. The video must be uploaded as a Roblox asset first.
  • Some community posts mention extra limits, approvals, or Roblox’s video upload system changing over time.
  • If by “Roblox ID” you meant an audio ID or animation ID , that is a different workflow entirely.

If you meant a video to emote

If your goal is turning video motion into a Roblox emote, that is not a one- click conversion either. The usual process is to recreate the motion as an animation, then upload that animation as a Roblox asset and use its animation ID.

Quick example

If Roblox gives you the number 1234567890, you would typically use: rbxassetid://1234567890

TL;DR: upload the video as a Roblox video asset first, then use the returned asset ID; you cannot directly turn a normal video file into a Roblox ID without uploading it as an asset first.