AFAIK Wistia comes with some great features but I am also concerned on missing out on the Youtube/Vimeo view count (if it means anything).
I highly recommend YouTube. You can configure the embed video to hide the YouTube watermark, autoplay, hide the controls, and hide all related videos (that show up after the video is done playing). This will make your video look amazing on your launch page.
Here is a link on how to configure the YouTube embed code parameters - https://developers.google.com/youtube/player_parameters
If you do your keyword research and optimize the Title, Description, and Tags when uploading to YouTube you can take advantage of more search traffic from Google and YouTube.