That would be fun to exploit. Just get a few hundred accounts, have them watch a Mr. Beast video followed by a video you want to boost, and watch the numbers grow
Not sure even a few thousand accounts would make a dent in a Mr beast video count. Recommendation would go toward the 1 million accounts who watch another Mr beast video after.
True, though the recommendation engine on YouTube will suggest other alternatives that are not on the same channel. There would still be a positive effect