Step 2) At the bottom of the video, find and press hold the thumbnail for a second. Then a prompt will appear with many options; click on the Delete this polo option.

Step 3) Now Confirm Delete to delete the video on the iOS device, and for Android, click on the Delete option.
Deleting a Received Video
If your friend has sent you a troublesome video, then you would like to delete the video immediately. To delete a received video on Marco Polo, firstly, you will have to go to the section that contains the conversation video.

Select the video that you want to delete, tap and hold the thumbnail on the video. From the prompt, select the Remove this Polo option, and the video will be deleted soon. The process is the same for both iOS and Android devices.
Deleting Entire Chat on Marco Polo including Video
If you clear your entire conversation with a friend, this will delete your Vidos and polos. Thus, you won’t have to worry about the embarrassing video you have sent earlier. Also, here the steps are similar for Android and iOS devices.
Step 1) Firstly, click on the three vertical dots right to the conversation that you want to delete.

Step 2) A sub-menu will appear on the screen, select the Block/Delete Chat option.

Step 3) Lastly, just tap on the Delete Chat option in the pop-up, and the entire chat will be deleted.
Conclusion
Marco polo is a decent application for iOS and Android devices for video messaging services. You can chat with your friends via sending Videos, also called polos.
However, you will be very disturbed if you sent something embarrassing to someone. Then you would like to delete the video. Therefore head over to the conversation, select the video. Click and hold on the Video thumbnail and select the Delete this polo option, confirm it, and the video will be deleted.
If you wish to delete the entire chat history, then select the three vertical dots beside the conversation. Then just select and confirm the Block/Delete Chat option form the menu. To delete a received video, head over to the conversation, select the video, press hold the thumbnail, and select remove this polo option.