Bought these as an extra angle for content creation. I did some tests with these glasses last week and am very disappointed. I don't know why but the video freezes on frames while recording and then comes back and stops again. The audio picks up well in good quality and doesn't stop or wobble. The problem is that I also expected the sequential video to match the audio. I have tested two brands of memory cards that meet or exceed the specifications for this product. I get the same result with both card brands. Bottom line, it's not about the cards, it's about the points. Not cool. Not only did I spend my hard-earned money on these glasses, I spent more money and time on multiple memory cards and tests instead of going to work or play. I do not recommend this product to anyone for any purpose.