* "Got" is informal. While commonly used in casual speech, it's best to use "received" or "obtained" in more formal writing.
* "Cutie" is slang. It's not the most appropriate term for a watch, even if it's meant affectionately.
* "Channel" is vague. It's unclear what channel you're referring to (TV channel, YouTube channel, etc.).
Here are some better ways to phrase the sentence:
More Formal:
* I received this free watch from the [Name of channel] channel.
* I obtained this complimentary watch through the [Name of channel] channel.
More Casual:
* Got this free watch from the [Name of channel] channel!
* Check out this free watch I got from [Name of channel]!
It's important to adapt the tone of your language to your audience and situation.