sure, no problem. you first find the link to whatever video you want, and use the tags [ youtube] and [/ youtube], just without the spaces, and put the link between the tags.
i wonder why no one's welcomed you.... so i shall.
Hallo, und willkommen zu Mibba! Ich bin Embraea.
Bonjour, et accueillir à Mibba! Je suis Embraea.
Hello, and welcome to Mibba! I am Embraea.