Why does my video not show after uploading?

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When you upload a video to TrainTool, it gets encoded to the right format for playback to participants. This encoding process takes a while, so after uploading, you won't see the video directly. When you save the page and come back after a while,  you will see a thumbnail of your video. This period increases as the file size increases.

If your video doesn't show up at all, please check the file name: don't use punctuation marks or brackets in the file name, as this may break the encoding process. Safe to use: letters, numbers. dashes (-) and underscores (_).