I think the best are the decentralized alternatives (what is the point of supporting centralized, DailyMotion, Vimeo , Break.com and others will simply suffer from corporate-government censorship if we all move to them); and of these decentralized options, Bit.Tube is the best of them all since it allows you to enter your Youtube credentials and drag all of your videos over from your old YouTube platform before you get platformed for spreading the truth, offending snowflakes or calling out bullshit.

However, View.ly and BitChute.com have a good following but don't have a video ingestion function either.
D.Tube has the best layout, taken straight from YouTube BUT their IPFS upload is the most unreliable , bug-filled, shitbox of all the decentralized options.

In my opinion, if these 4 companies joined forces, they could take out YouTube in 2 years. If not, they could all fail to get traction.