We’d need to see the .hype document and video, but I can say that SVG masking does have some significant browser rendering bugs, which is one reason it hasn’t been implemented in Hype yet. You may want to try unchecking Use WebKit graphics acceleration and/or checking Position with CSS left/top in the Document Inspector and see if these different render modes help.
Hi @Rick4F
I am in China, and we are blocked to access any global resource, like google, facebook, twitter, yahoo, dropbox…even I am using VPN everyday.