用婚礼， 支持， 深刻，度过，魅力 写一篇80字左右的短文

When you say something at a wedding. it is not a lecture（讲座）but a speech（发言）, and when you give a speech at a wedding, we usually do not use 深刻(profound), even though 深刻的讲座，深刻的发言 is grammatically correct. It is just not usually used to describe wedding speech.  You can use 有意义的发言，有趣的发言，难忘的发言，受欢迎的发言 at a wedding. You can use 深刻的讲座，深刻的发言at a classroom.

If you really want to use 深刻 in this situation, you can use it as 令人记忆深刻的发言，深刻 does not mean profound anymore in this longer phrase. It means deeply remembered by people. 深刻  is more like adverb to describe 记忆的程度。

作为伴郎，我准备了十分钟的演讲。

讲座：formal lecture, conference, seminar, or presentation

演讲：speech

我刚开始有点紧张，所以喝了一点酒，然后开了个玩笑。

我说了有谁又聪明哦

I don't quite understand this sentence.

我忘了这是我弟弟的婚礼，我还没结婚了。 之后我老实说我很爱我弟弟，他变成个很魅力的人。我们从小长大的时间过得很快，但是我们每次度过的时间都很开心。后来我家人干杯，放一段我们年轻时候的视频，然后把麦克风给主持人。

I think the meaning of this composition is delivered, but pay attention to punctuations.