There are times when a user will upload a video and it successfully uploads but then fails to play in another website's video player. A potential cause for this failure could be that the video player doesn't support the encoding within the uploaded file. For instance, two MP4 files can have identical file extensions, however, they can use different video codecs.
Open the direct media url in a browser to see if the video is accessible. If you can open the video, however, it won't play correctly in your target player, then you need to determine what types of formats and codecs your target player will allow. A link to the video that has expired or a video that is restricted in some way could cause the video to not load.
Media2URL will not automatically process every video that is uploaded via the Video to Link workflow. If your recorded video requires some processing, please perform those tasks prior to uploading the processed video for sharing.