Don't count it down.
Choose a better name for your fake studio.
Let's review:
A random grenade with an overused sound clip.
Another random grenade with another overused sound clip.
A car starting...?
Deadly water with another overused sound clip.
A truck hits a car and explodes, the same overused sound clip.
5 overused sound clips.
Very slow paced. You need to speed things up.
Material is not even remotely funny.
Bag the painfully outdated memes.
You've done everything wrong. I'd like to say you have potential if you practice but I really don't know if you do.