I believe it is. I think you can fix this by using an AspectRatioConstraint not too sure. Also make use of the Test → Device window on in roblox studio to see if other device render the frames similarly.
Video stuff
Watch the plugin install chapter and 8:25 to 8:40 for the AspectRatioConstraint
And watch the 8:50 to 9:00 for the Test → Device thing https://www.youtube.com/watch?v=BLZl-0cl2DM