What iPad is it? I could see a memory issue making your app to quit, but past the iPad 1 this should be OK. For instance, it works on iPhone 6 and 4S + iPad Mini Retina 1 on Safari. I’m pretty sure it would on Chrome too.
To begin with, wipe out all the memories of your iPad with a hard reboot: hold both home and top button until the iPad dies (ignore the reboot slider) and you see the Apple logo. Then try again…
It’s not going to solve your issue per se, but I have a suggestion maybe… when you have “more videos” to show, you should/could create a nice channel on Vimeo. You have options to populate it and to make it look a bit like your site, add a banner etc. It’s better than building a huge page like you did that risk to let down people with a light configuration.
Alo on a site I’m building with Webflow, a developer made me a JS that launch a different vimeo video in a popup, so that you don’t load one million players. It works great, it has limitations though, because the Vimeo API is (known to be) a huge pain in the eye.