Pallas I use VideoPad. It is not the most professional tool, but it is fairly cheap and quite easy to learn. I would say, it is very intuitive.
If you are more interested in this, you should start a dedicated video editing thread. There are lots of different opinions and many other tools that work as well. Maybe some are even total for free?

I use DaVinci Resolve, which has a pretty robust editing feature. I recently experimented a little with captions and other effects, but obviously I don't have the talent and patience for it that WieWaldi has 🙂 But if you're still looking for something, then I can highly recommend it as well.

I think one needs to try for both the notes and the rhythm when practicing sightreading. Notes and rhythm are the foundation stones of music. The other markings in a score may be from the composer or they may be editorial, but the notes and the rhythm are from the composer. I made the mistake of making rhythm the poor cousin of the notes, and had to spend a long time fixing that bad habit.

Rhythm or notes: what is more important?

I'll answer this question first from the point of view of a professional sight-reader. If you're accompanying an opera rehearsal, or playing chamber music, both are equally important. If you play the right rhythms, but the wrong melody and harmonies, the piece will be unrecognisable. Ditto if the melody is correct, but the rhythm is random.

But that's not all. Let's say you have a passage marked pp, vivace and all in staccato. If you play every single note right, with the correct rhythms, but you play ff, lento and with lots of pedal, it will be a disaster.

So, in order to be a good pro sight-reader, do you need to get everything exactly right straightaway? No! You scan the music, get a good idea of how it should sound, and concentrate on the essentials. You may leave out a load of notes, or get some details of the rhythm wrong, but you produce something recognisable, you stay together with your colleagues and you make music.

That's the goal to aim for in advanced sight-reading, but if you're near the beginning of your sight-reading journey, it will be too much for you to try to assimilate everything at once. Quite possibly your brain will freeze up, and you will achieve nothing.

What should you do? Work on each element separately first:

If you want to work on rhythm, just clap or tap the rhythms.
If you want to work on harmony, find a piece with a lot of chords and enjoy the progression of one chord to the next. To hell with the rhythm!
If your left hand is weak in sight-reading, read just the left hand part. You can also find simple pieces for left hand alone, for example here.
And so on...

Give it time. As you become more fluent in each element, it will become easier to put them together.

Finally, a big bravo for anybody who has the courage to record their sight-reading and post it for all to see and hear. You have my undying admiration!

    Thanks so much for that @MRC - it makes perfect sense to me. I think most who posted here are still at the "how do I spell that note again?" stage. I know I am 😁 It's simply impossible to get everything right at first glance... but it's getting less horribly difficult all the time so I guess there is hope for us still 😅

    I think it is also important to recognize the purpose for practicing sight-reading, which could be very different depending on the situation. For someone that is already somewhat accomplished and play together with others it is obviously of utmost importance to be able to listen and follow the timing. It is also important to know what can be simplified and skipped in a first read-through if the complexity is too high to nail it all prima vista. It's also necessary to always keep track of where in the sheet music the rest of the musicians are in case you flub totally and have to skip some beats or a measure or two before getting back in.

    But the way I understand this thread, the sight-reading practice here is of a different nature and purpose. It's primarily in order to learn to read at all or more fluently, not in order to be able to eg accompany soloists in the near future without seeing the sheet music in advance. For someone who is very new to reading and doesn't yet have immediate recognition of all notes on the staffs including ledger lines it makes total sense to me to practice this specifically. If you are able to read a passage perfectly with all dynamics, expressive markings etc on your first try I'd say the material is too easy to be of real value to learn to read better. We generally learn best when appropriately challenged, so if someone can read/clap rhythms fine on their own but struggle to recognize notes, chord and arpeggio shapes and to figure out fingerings on the fly, I think it would be good at that stage to focus the practice on the aspects that cause struggle, even if it means not being able to keep in time when it gets tricky. But you need to be clear with yourself why you are practicing reading.

    MRC This is a wonderful answer, and gives me the confidence to practice in this way myself. It immediately leads to a number of possibilities to come up with targeted practice strategies to optimize practice. It also points out why various answers in the thread, for instance mine and Bart's, aren't discordant with each other. Thank you.

    Pallas Well done! You have made amazing progress since yesterday!

    Ok then, since you are all so terribly brave... here is mine. It is the first part of my "next up" Alfred piece: Deep River. So not really two levels below my skills (because there ARE no two levels below my skill). I wasn't brave enough to tackle the second part because that one I'd definitely need to puzzle on a bit longer and probably play each hand separately a few times before trying to go through it.

    I wish you guys could have seen Simba's stare at the end... like he was telling me "what on earth are you trying to do here?!" But unfortunately his face was just above camera.

      Pallas oh my gosh, what an improvement! Ok, the left hand didn't seem to be that hard as you are playing the same chord over and over again. But still, it was so fluently played that I couldnt believe by ears. I was really thinking, this is impossible. She must be cheating by practicing the piece before. Then I realized this left hand. You could focus on the RH, and only and need to know when left hand has its turn. Then it seemed to be more realistic to me. Dont get me wrong: Still very good and so fluent. What an improvement!
      (If this LH thing wouldnt have happend, I would have sold my piano, because of frustration)

      Sophia
      Well.
      Hmm
      okay
      ...
      This piece used for sight-reading is very challenging for starters. I mean we (the brave we) started with one-liners. 4 bars, not that many notes. Maybe not even songs. But still playable stuff that has harmonies, easy enough to hear if something went wrong.
      Maybe you should get sheet music that is designed to learn sight reading. Then you will find material two levels below you. Believe me, it exists.

      Nevertheless you did remarkably well, considering how difficult this piece is...
      Tell Simba to give you a big hug and at least twelveandtwenty claps on your shoulder with his paw.

      Lol thank you. I wanted to start with something easier, but I didn't have anything at hand. I mean haven't opened my new Easy Classics book yet. And I didn't want to use the John Thompson kiddie book because that starts with C C C C C C C... though to make it harder that C is sometimes played with the left thumb and sometimes with the right thumb.

      But you are right, I should buy one of those books you mentioned in the other thread... I will... someday 😂

      Pallas ...because I remembered the point isn't to impress anyone.

      You failed 😅

      Lol! So true!

      At least I excelled in not impressing anyone, not even Simba 🤣🤣🤣

      Oops sorry cross posted with you ranjit!

      We are truly Brave! It takes real courage to post a non-perfect video and we all did it 😃 (ok Pallas was perfect, pfft, be like that)

      Think you're good at rhythms, eh? Try clapping out this one 😉

      It took me a couple of tries to get it at a very slow tempo.

      Edit: I'm not trying to diminish anyone's accomplishments or deny those who feel they have to practice note reading first but if you want to eventually sight read more advanced music you have to practice more difficult rhythms too.

        Also I don't want to leave the impression that I'm always sight reading rhythmically correct. My sight reading is far from that good, with lots of slowing down and stopping. I can only do it strictly in time when it's really easy which for me is something like RCM 4 or 5. But I made a lot of progress since I started trying to play in strict time.

        ranjit okay, this is another level. Still behind your ability to play polished pieces. Ok, your polished ones are way above, to be fair. But if I remember correctly, you stated to be a sight-reading beginner yourself, and this was really NOT bad.
        I guess you are a very ambitioned pianist, so I can't wait to see another video from you. And see how big the improvements are, if someone at your level and ability is training this discipline. Thank you for joining the club of people, showing their skill to perform a piece without practicing.