Write an article based on this "Go to the Convert2MP3 website. Tap the "Insert video link" text box. Paste in your copied YouTube address. Tap mp3. Tap mp4. Tap convert. Tap Download. Tap Download when prompted. Open your downloaded video."
Tap the address bar, then type in convert2mp3.net and tap Go. This will open the Convert2MP3 website, which is the service you'll use to convert your YouTube link into a downloadable video. You'll find this near the top of the page. If the page displays in German, you can switch to English if necessary by tapping EN in the top-right corner of the page. Long-press the "Insert video link" text box, then release the box and tap PASTE when it appears. You should see your YouTube link appear in the text box. It's below the address box. A drop-down menu will appear. This is in the drop-down menu. Doing so tells Convert2MP3 to convert your video's link into an MP4 video. It's below the "Quality" drop-down box. This option is in the middle of the screen. If you instead see an error that says the video can't be downloaded, your selected video contains copyrighted material and thus cannot be downloaded via the Opera Mini browser. It's at the bottom of the screen. Your video will begin downloading.  If this is your first time downloading anything via Opera Mini, you'll tap ALLOW when prompted before the file will download. You can watch your video's download progress by swiping down from the top of the screen and looking for the "Opera Mini" notification. Once your video finishes downloading, you can watch it from within the Opera Mini web browser by doing the following:  Tap the "O"-shaped Opera logo in the upper-right corner of the page. Tap Downloads in the drop-down menu. Tap your video's name in the resulting menu.