Vimeo Autoplay / Design Question

I have looked all over the forums before posting this and could not find anything definitive. So, I just wanted to run this by you guys. I’ve been using the Enfold theme for quite some time and absolutely love it! It does everything that I need and I get compliments often on the site. My website is http://www.jamesshulerphotography.com and the question I have is the bottom four videos (next section after the top 3 below the full screen image). I’m pulling from those particular videos from Vimeo. I’ve got the file size rendered down to approximately 800k or so on each and inside each element I have the following: https://player.vimeo.com/video/VIMEONUMBERHERE?autoplay=1&byline=0&portrait=0&iframe=true (this was based on another post and this seemed to work much more. However, it does seems to be hit or miss to have all four consistently load at the same time. The top 3 (above) are locally hosted and so they fire up every time, though it does take a little bit of a hit on the load time of the page. Could this hit or miss be to the fact that I’ve got multiple requests, at the same time, reaching out to Vimeo to pull the video? Have you guys seen this and does that make sense what I’m saying? I’ve cleared the cache and tried multiple machines — and sometimes it works great – and other times I’ll get 2 of the 4 to load, or 3 of the 4 to load, etc. With the file size, I didn’t think it would be a problem at all. In any case, thanks for any help / assistance that you can provide.