It should be "Kamen Rider: Heisei Generations, FOREVER". Come on, all knights and civilians.

It should be a clip that was released on bilibili. Later, someone must have accused that this would kill the subtitle group (if you are interested in knowing the details, you can Baidu) and then asked UP to delete it, because Tencent happened to be vigorously The period when masks were introduced.

If you watched this clip a few years ago, it should be "Heisei Knights vs. Showa Knights: Kamen Rider vs. Feat. Super Sentai". It was a big fight with leather jackets, and the ending was criticized and downgraded.

The above resources can be found on Tencent Video.

Supplement: Another possibility is the summer theatrical version of 2019, "The Movie: Kamen Rider King Over Quartzer", your description is also correct.