Video removed: Inappropriate content without Community Guidelines

YouTube is one of the largest and most successful media hubs that can be visited on the internet. For every 60 seconds, 1000 hours of video are uploaded to the YouTube server. All videos pass through the Google content ID system to be scanned for copyright violations and inappropriate content. YouTube is excellent for spotting violations and removing.

There are primary reasons for video removal.

• DMCA takedown
• Content ID match
• violation of the YouTube Terms of Service
• Community Guidelines for inappropriate content

Video removed: Inappropriate content

YouTube has some pretty evil schemes, and videos deleted for no reason is one of the worst. Youtube team doesn't tell you which guideline you avowedly violated, which is one of the stupidest things of all time. A Web developer or programmer with half a brain would realize, Youtube should at least give some clue.

Violating Terms

Most of the time youtube remove video for the safety and privacy of the user who uploaded it, or due to a first-party complaint, court order. In these cases, your youtube channel will not get a strike, and the account will not be penalized. In unusual circumstances, the problem can be resolved if it was in connection with a copyright violation. Maybe you used copyrighted music in the video. In this case, you could remove the sound from the video, substitute commercial-free music, and re-upload.
Other reasons kinda weird, considering there are plenty of videos talking very openly about "exotic" sex practices, sex with other species, minors talking about sex and none of which have an age restriction. So language-wise Youtube never seemed to have a lot of limitations, considering that, flagging your video seems quite excessive.
YouTube sets some rules, and for the use of the platform, you must follow them.

• Do not post pornography or sexually explicit content.
• Cannot post content, including illegal actions, including animal abuse, drug abuse, underage drinking, bomb creation, etc.
• Do not post graphic and gratuitous violence. 
• It cannot post hate speech or assault content.
• Must avoid anything that may be considered spam.

Rejected (content inappropriate)

Sometimes you upload a video, and it gets this Error message Rejected: Content inappropriate. And you can't figure out why. Maybe sometimes  It can be due to misleading thumbnail, misleading tags, misleading title, or cramming the description with irrelevant keywords. In other words, YouTube thinks you are trying to play the game in the search system.
Here is another issue that sometimes happens: YouTube thinks that video is misleadingly representing as an "official" video of any company or product, especially when you are using a company name or the logo in a way that misleads people in the thumbnail, title, description, or video itself.

Community Guidelines strike

If you received a Community Guidelines strike along with the video's removal, then you may be able to appeal the community Guideline strike. If you did NOT receive a Community Guidelines strike along with the removal of the video, then there's a good chance the problem is with the video's metadata (i.e. title, description, tags).
Once the appeal was received and Youtube Team agreed to keep the community guideline strike and video down, you now have to wait till that strike expires and you're on "probation" for that time (3 months). Usually, there's nothing you can do regarding getting the video back up. Though you may be able to use something from YouTube's response to these requests, to prove your point:

"While Youtube Guidelines generally prohibit nudity,  and we make exceptions when it is presented in an educational, documentary or artistic context, and take care to add appropriate warnings and age-restrictions."

Appeal the Decision

Just removing the video and re-uploading will not provide your account with a clean slate. A strike on a video will still stand long after an offending video has been removed. If you are successful in and Youtube approved your strike appeal against your channel video removal, the strike will remove, and the content will restore. If you are unsuccessful in challenging the removal, everything will remain the same the strike will stay on.
It kinda annoyed that they have a word limit on their appeal message and they don't tell you. Since 3 strikes kill a channel. You really depend upon an appeal to prevent that from happening. I'm happy humans review it though. You can appeal the following message:

"My video contains no pornography or sexually explicit content. All content is obviously humorous and not meant seriously. Why my video when others' active YouTube content violates your restrictions?"

There are ways to appeal in some other words.

I received youtube community guideline strike. I don't know why? And I am not agreed with this strike because my video doesn't contain sexual content, harmful, copyright issues, hateful content, threats, spam, misleading metadata, or scams. So please remove this strike from my channel. There are many videos in youtube which have the similar type of content but why my video was only removed? I think my video does not violate any type of guidelines, so please remove this strike from my channel.