У вашего броузера проблема в совместимости с HTML5
If you have GD on all your platforms (e.g on PC, smartphone, tablet and laptop) punch your brain.
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The video is made with rough intentions to expose a range of problems and issues that Geometry Dash has.
However, the probability of RobTop fixing listed complaints are unlikely :( Because he is quite lazy and perhaps doesn't know how to fix them.
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Bonus Clip explanation (thorough): I was playing Command and Conquer 3: Kane's Wrath and destroyed the Scrin MCVs much earlier that needed and the veteran Eradicator Hexapod appeared which was about to rape my base. However, with the insane jukes of my Raider Buggies, Black Hand sacrifice (press F to pay respects) and veteran Avatar (+ with beam cannon laser), I was able to take it down and complete the mission. That is all to say. RULES OF NATURE!!!!!!