If you mouse over the vid, a gear icon should appear in the upper right hand corner. You can click on the gear and choose the "Optimized" version and this should get the vid playing.
Click this gear for playback options.
If you're not seeing the gear, please reach out to us at help@manyvids.com and we will test things out on our end and help you with this.
Read through our Vid Streaming Troubleshooting Tips to ensure that you have the best streaming experience!