Users can upload videos of up to 4GB to Munch, but you can bypass this by uploading a link to a public source like Google Drive.
Step by Step:
Go to Google Drive.
Click 'New' in the top right corner.
Select 'File upload.'
Choose the file you want to upload.
Click on the uploaded file.
Click on the three dots in the top right corner.
Click 'Share.'
Click on word 'Restricted'.
Select 'Anyone with the link'
Click 'Copy link'
Paste the link in Munch.