I always wait for my videos to finish uploading to IPFS before submitting the form. I also have my own IPFS Gateway which I pin my videos on so they never go away. The videos play just fine for me, faster than other videos in fact.
A lot of people are recommending DLive, but they're not really decentralized. They stopped using IPFS and just host the videos on their private servers. The D in DLive means decentralized, so it strikes me as odd.
What IPFS Gateway do you use and is that a rented online space or how do you handle this just via the phone ??
I rent a server from @privex and then configure it myself to be an IPFS gateway using SSH apps (there are many).