Preliminary results (tested in Chrome on a macbook):

• 9 small videos play without any problems
• 9 large videos play without much issue but there appears to be a lot of time spent decoding and some of the videos stutter as it buffers (this is more pronounced on a hard reload of the page so some of this appears to be cached if the videos are loaded beforehand)
• 1 super huge video is fine, 2 is pretty good, but things very quickly fall apart and stutter at 3+