Steps
Use NSFW tricks

Type the video title into the search bar at the top of the YouTube page.

Press ↵ Enter.

Click on the video link. The video will appear along with a "Content Warning" screen that asks you to log in.

Click on the video URL. After clicking the URL in the address bar, the link will be highlighted.

Next, click just after the part .www. to position your cursor at the beginning of the URL.

Then, add the four characters nsfw.
- For example, the link https://www.youtube.com/watch?v=MLUvOtqTmYM will become http://www.nsfwyoutube.com/watch?v=MLUvOtqTmYM

Press ↵ Enter. Your video will open in a navigation page. Now, you can watch it without logging in.
Use the Listen On Repeat trick

Type the video title into the search bar at the top of the YouTube page.

Press the ↵ Enter key or click the magnifying glass icon to search.

Click on the video link. The video will appear along with a "Content Warning" screen requiring you to log in.

Click on the video URL. After clicking the URL in the address bar, the link will become highlighted.

To access YouTube without interruptions, type repeat after the word 'youtube' in the address bar. For example, the link https://www.youtube.com/watch?v=MLUvOtqTmYM will change to http://www.youtuberepeat.com/watch?v=MLUvOtqTmYM.

Press ↵ Enter to navigate. The video will play on the Listen On Repeat page, and you can watch it without logging in.
Use an intermediary Proxy.

Visit www.hidden.in to access YouTube via a proxy. A proxy service is useful if YouTube is blocked. Enter the address www.hidden.in in the browser's URL bar and press ↵ Enter.
- Some proxy sites may be blocked by certain organizations.

Type tubeunblock.org into the search bar located in the middle of the screen.

Uncheck the box labeled 'Remove Client-Side Scripts.' Deselect the option next to 'Remove Client-Side Scripts (Javascript, VBScript, etc)' by clicking the checkbox.

Click on 'Surf.' You will be redirected to the tubeunblock.org page.

Search for the video. Enter the name of the video you want to watch in the search bar at the top of the screen, then press the ↵ Enter key.
- You can also click the magnifying glass icon on the right side of the search bar to start searching for videos.

Finally, click on the video. The video will now play normally.
Change the URL.

Visit YouTube.com. You can access YouTube by typing www.youtube.com in the address bar or by clicking here.

Type the video name in the search bar at the top of the YouTube page.

Press ↵ Enter.

Click on the video link. The video will appear with a 'Content Warning' screen requiring you to log in.

Click on the video URL. After you click the URL in the address bar, the link will be highlighted.

Highlight the section watch?v=. Find the part watch?v= in the URL, then click and drag the cursor to select it.

Next, type v/ to replace the highlighted part watch?v=.

Press ↵ Enter. This will bypass the Content Warning, and the video will appear, occupying the entire browser window.
Warning
- Don't forget to clear your browsing history or use incognito mode if you don't want others to know you watched those videos.
- Proxy sites may be blocked by certain organizations.