Have you ever had a similar experience?d this: Have you ever experienced this:

"Have you ever had a similar experience" is a phrase I would use after discussing the situation. So you start the conversation asking if the reader has experienced something I would format it as "Have you ever experienced this:".

The new term is about to start, but you haven't finished all your homework yet.? The new term is about to start, but you haven't finished all your homework yet?

Might be more of my own opinion, but I'd add a "?" here as you are generally asking a question!

Last night. Last night

Last night.

Last night, I had this kind of experience. Last night, I had this kind of experience.

Last night, I had this kind of experience. Last night, I had this kind of experience.

Then last night, the night on the last of the Chinese New Year holiday, I just found that I hadn't done it. Then last night, the night on the last of the Chinese New Year holiday, I just found that I hadn't done it.

Sentence is correct, but another way to phrase it could be "last of the Chinese New Year holiday, I just realized that I hadn't done it."

Then last night, {the last night on| the lastend} of the Chinese New Year holiday, I {just found | suddenly realized} that I hadn't done it. Then last night, {the last night | the end} of the Chinese New Year holiday, I {just found | suddenly realized} that I hadn't done it.

So I immediately grabbed my phone and edicreated a video about one of my Niaoxiaohua -- a dahlia immediately. So I immediately grabbed my phone and created a video about one of my Niaoxiaohua -- a dahlia.

It’s possible to keep “immediately” at the end of the sentence, but then you’d need to add another long dash: “…about one of my Nianxiaohua -- a dahlia -- immediately.” I don’t think “edited” works well in this context, since you had to do much more than edit a single video clip: you recorded several clips, combined them, added voiceover, captions & subtitles, etc. “Created” works well instead.

So I grabbed my phone and edited a video about one of my Niaoxiaohua -- -dahlia immediately. So I grabbed my phone and edited a video about one of my Niaoxiaohua-dahlia immediately.

I'll show you in a week -- at least I hope so. I'll show you in a week -- at least I hope so.

“At” should not be capitalized.

I hope that I'll show you in a week --. I hope that I'll show you in a week.

At least I hope so.