У вашего броузера проблема в совместимости с HTML5
I decided to make a decent looking wood speaker box with a chromecast built in to hide all of the cables. Overall, it came out nice.
To see how I made the aluminum panel on the back, see the video explaining that in detail here: https://www.youtube.com/watch?v=bBKg9Qiq72U
To see the construction of the speaker grill, see the video here: https://www.youtube.com/watch?v=Lhs2lVLEZC0