I managed to find the video in the cache folder of canvas but the video only lasts less than half a second despite having a file size of 745 MB.
Is there any way for me to recover the full video?
The problem still remains whenever exported to a computer.
However, I opened the exported video in notepad and found that a lot of video tags such as lmvhd or stts are included at the start of the file and also towards the end. So it seems like the video is instructing the computers to play a very brief section of the video while still storing the rest of the video.
Is there any way to mess with this file so that the full video is played?